Diesel > winch
Believe it is only the winch that changes the springs. As mention before, Eibach only have 2 lifted option springs; winch and no winch.
From what I can determine thus far;
--FRONT--
2 green circles is the lightest FRONT spring (2seat diesel + no winch, or a 2seat with lighter petrol engine + winch + dual battery + roof rack + side steps, or interestingly a 5seat diesel + no winch).
2 red circles is the heavier FRONT spring (5seat with lighter petrol engine + winch + dual batteries + snorkel, or interestingly a 5seat diesel + winch + side steps + roo bar + brush guards). I would have thought this last example would have an even heavier front spring.
--REAR--
2 blue triangles is the lightest REAR spring (2seat diesel + no winch).
2 green triangles is a bit heavier REAR spring (2 seat petrol + winch + dual battery + roof rack + side steps).
2 red triangles is the heaviest REAR spring (5 seat petrol + winch + dual battery).
5seat adds a lot of potential mass to be controlling = heavier springs.
@AnD3rew , would love to know your rear springs as it appears yours is the most fully loaded (5seat) of all of these rigs.
N1 - 5 seater, no winch. Diesel engine. Green circles at the front, Red triangles at the back.
**LIGHT**
DCPU; UK spec, N1 (which is a 2seat UtilityWagon/UW, but then you had them add the rear bench to make it a 5seat??), RHD, diesel, no winch, 17" steel wheels with BFG KO2 tyres, ROOF RACK, LIGHT BAR, SNORKEL, SIDE RUNNERS OR ROCK SLIDERS?
Front: EI-0000019546 (2 green circles)
Rear: EI-0000021752 (2 blue triangles)
Logsplitter; 2 seat commercial (N1 UW), petrol, winch, roof rack, side steps/runners, dual battery, tow pack etc.
Front: EI-0000019546 (2 green circles)
Rear; EL- 0000019550 (2 green triangles)
**MEDIUM**
Voader - Oudersopzwier; EU spec N1 5seater, diesel, no winch. ROOF RACK, LIGHT BAR, SNORKEL, SIDE RUNNERS OR ROCK SLIDERS?
Front: EI-0000019546 (2 green circles)
Rear: EI-0000021751 (2 red triangles)
Jean Mercier; EU spec M1 SW 5seat, Trialmaster, LHD, petrol, winch, dual battery, BF Goodrich A/T, steel rim, safari windows, snorkel, NO side steps.
Front: EI-0000019547 (2 red circles)
Rear: EI-0000021751 (2 red triangles)
Arkaig; UK spec, M1 SW, Fieldmaster, RHD, diesel, winch, WHICH TIRES/WHEELS?(adds some unsprung weight to the rig). ROOF RACK, LIGHT BAR, SNORKEL, SIDE RUNNERS OR ROCK SLIDERS?
Front: EI-0000019547 (2 red circles)
Rear; ?? (??)
Eldoret Blue up on inspection rack, Seattle WA; USA spec, M1 SW, Fieldmaster, petrol, winch, 18" alloy, roof rack, side runners, SNORKEL?
Front: ?? (??)
Rear; EI-0000019650 (??)
**HEAVY**
AnD3rew; Aussie spec M1 SW, Trialmaster, RHD, diesel, winch, side steps, roo bars, brush guards. WHICH TIRES/WHEELS, ROOF RACK, LIGHT BAR, SNORKEL?
Front: EI-0000019547 (2 red circles)
Rear: ?? (??)
Everyone can keep adding their data to this list...