I'm not sure what manual winches have a 10 foot pull each time? A hi lift jack, pressed into use, might give you half that but the particular instance of the Grenadier integrated winch vs a "normal" manual winch then we are talking 15m vs 20m.
Why you would need to move the heavy bit. It works equally well attached at the vehicle end, moves with the vehicle and there's only the same rope/kit to pay out on each reset.
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I suppose it depends on how you use it, but from a purely practical perspective, here's my experience using manual winches as compared to mounted, electric winches that perhaps better illustrates what I mean. I'm not suggesting this is the best or only way of doing things, but it was my experience and why I prefer the mounted, powered winches.
Manual Winch (I'll use this term - there are purpose built manual winches, there are come-alongs, and there are HiLifts, all of which have been discussed -- all have advantages and disadvantages compared to each other, but all share disadvantages when compared with an electric mounted winch).
1) It's in my garage, I'm going on a trip. I need to put it into the vehicle somewhere, because unlike a receiver hitch I can't just pop it into the tow receptacle, pin it, and drive off. So now the object is taking up cargo space, and in my vehicles that's always been a premium. It came with a decent length cable, for sure....but that's heavy, and takes up even more space in the back. So I'll bring a shorter cable to save on space.
2) Now I've packed my manual winch, but was forced to leave the beer behind. That's OK, I'm on a grand adventure. And now I'm stuck in a mudpit. Better get the winch out.
3) Holy cow the ground is slippy. I will have to be extra careful lugging around this 40lbs hilift/come-along and its similarly heavy cable to put it into position where I can use it.
4) Ok, I've carefully made it to the front of the vehicle with this manual winch. I can hook one end to the rig, easy enough. Now I play out the cable to hook the other end to an anchor point. But then earlier, I decided to bring less cable because there was less room in my rig. So now the attachment points are limited.
5) I've been lucky - I found a suitable attachment point for my first pull! Time to start winching.
6) Click-clop-click-clop-click-clop -- Oh hey, the rig is moving a bit! That's great!
Fast forward some significant period of time -- how long depends on how many times you have to actuate the winch handle for every inch of forward movement.
Click-Clop-click-clop-Click clop -- That's it, I'm at the end of the pull. Time to reset. Man, I hope I don't have to do this too many more times, my arm is tired.
7) Assuming the winch is at the car end (which, I admit, is a good idea that I've not seen too many people use; for whatever reason the winch tends to be at the anchor end. Perhaps a safety concern with being too close to the vehicle if it shifts? Genuinely don't know). But in this case, it's at the car end, and I'm not aware of a safety issue so I don't have to move that. But I do have to hop in, set the brake, chock the wheels, and then disconnect from the anchor and play the cable back out to the next anchor point.
8) Repeat step 6, except now I'm probably sweating. A cold beer will taste great after this. Damnit I left them at home, didn't I? I guess water will do. But now I'm tired, sweaty and disappointed.
9) Repeat steps 6 through 8 for as many times as I need to to get through the mudpatch. I expect this will take significant time and exertion to achieve. There's also increased risk of a slip and fall, which in remote areas, is a serious concern. Add on bad weather - like below zero snow conditions, which are common in my part of the world -- and a manual winch goes from being annoyingly hard work, to being dangerously annoying hard work as frostbite and numb hands getting pinched becomes a serious concern.
As contrasted with a mounted winch:
1) It's always there. I check it every oil change for function. I'm not worried about it taking up valuable cargo space. I'm already in the mountains, bogged in the mud. Wow - the ground is slippy. Good thing I only have to move a 5-lbs shackle or straps, and not a 50-100 lbs weight on this terrain.
2) Because it's always there, I have 50' of light, synthetic rope ready to go on the spool of my electric winch. I hop out, flip the clutch on the winch, and freespool the rope to an anchor - and I've got more options in anchors, because I didn't cut the rope length to save space/weight.
3) I connect to the anchor, hop back into the vehicle, push a button to respool the winch AND use the vehicle's own power to make forward progress. This takes probably less than 5-10 minutes, and even in bad mud my tires may find enough purchase to keep going under their own steam. With me outside the car operating a manual winch, I might miss those traction opportunities completely as I'm unable to use the vehicle's own power to aid in the recovery. Obviously this changes if there are two people present, but do you think I'd leave the beer behind if I could instead tell my friend to take his own rig?
4) I get to the extension of my pull, set the park brake, chock the wheels, spool out the rope again to a new anchor.
5) I repeat steps 3) and 4) till I'm through the mudpatch. I'm in and out of my rig less often, I'm not exerting myself in a mudpit on the side of a mountain, and so I'm generally safer as in this scenario there are both fewer resets, and the resets that are required are a bit easier and more comfortable since I'm spending most of my time sitting in the Air Con'd or heated cab. And the less exertion is no joke, nor is it completely based on lazyness on my part -- heart attacks spike every year at the first snowfall around here, because folks aren't used to unusual periods of intense activity -- they ain't fit enough -- and their hearts give out. Unless a person is manually winching regularly or in reasonably sound health and good overall fitness, I think it's a bad idea for anyone in my demographic or older to assume they will be able to easily run a manual winch on that one or two weekends a year they need to do it.
I'm definitely not suggesting manual winches won't work -- they absolutely will and I'm sure for some folks it's the best option. But in my experience, electric are way better if the winch is expected to see any sort of regular use in a travelling context, especially with long runs of repeated winching. The advantages vastly outweigh the negatives. On the other hand, not everyone has $2k to spend on a winch-compatible bull bar and another $1k for the winch itself - a manual winch is way better than no winch at all!
... 
) and a set of Maxtrax there'd have been no need for the Aldi "pullalong"... Hard core it wasn't... Noosa beach
