Here are some spring rates for OEM vs. various aftermarket lowering springs:
OEM vs Eibach vs Ark Spring Rates
IMO, only Eibach spring rates make sense to me. Any time you lower a vehicle, regardless of what type it is, the lowering springs need to have sufficiently higher rates to compensate for the reduced suspension travel. This allows the vehicle to maintain similar load handling as stock. Since max load = spring rate x max suspension travel, if you lower the car's ride height and reduce suspension travel by 15%, the new spring rate needs to be no less than 15% stiffer.
FWIW, Eibach has two spring kits:
E10-46-035-02-22 for 2.0T RWD (F0.8"/R0.8")
E10-46-035-01-22 for
3.3T AWD (F1.4"/R1.2") and RWD (F0.8"/R0.8")
The lowered ride height will differ, depending on how much weight is over each axle. Eibach lists the approx, lowering amount on their website. To add to the confusion, some of the lowering amount disparity is due to the AWD suspension having slightly higher static ride height than the RWD suspension.