I don’t know yet – both have pros and cons.
The standard seats are easier to get in and out of and have height adjustment. They also hold my back better, although not my legs.
The optional shell seats look fantastic and as they’re not very thick free up space in the car, plus they also give better visibility (again as there is less seat to look around). They don’t hold me quite as tightly – although would suit fatter or larger people. The alcantara does improve the ‘specialness’ of the interior. They are also mounted too high (as per all of the reviews), although that can be sorted with the JCR seat lowering frames. In the meantime, I have just changed the angle of the seat rest and I’ll see how it goes!
Both seem fairly comfortable.
The image shows both seats side to side during installation – all of the standard seats have been removed for now. I’m keeping them and will decide a few months down the line!