I would be concerned that it is tuned to modify the specific model vehicle you are plugging it into. This doesn't allow for modifying the Ineos Grenadier tuning.
How would you know which one to choose??
So if I was to buy my chip, I would use BMW X7 3.0 V6 single-turbo as my vehicle baseline. I believe the weight of the X7 would be closest to the IG. Having said that, I doubt seriously if the weight really matters. I had a Stage 2 chip that I used on a Mini Cooper and transferred it to a Honda - with similar performance upgrade. I'm no expert on this chip at all. But I've used four (4) of them with very positive results. But it's not for everyone.
I think that the biggest concern is what @Asnes stated, that if the power increase is too much, that the transmission could potentially get damaged...