Before I purchased my F-sport I test drove the std. and F-sport versions,I had both for 24 hours so not very long but enough for me to get a feel for both cars.As you said the F-sport seats are more form fitting whilst the std. seats are extremely comfy but slightly wider,,as for the AVS I use this in conjunction with the sport mode and use the paddles to simulate gear change,this is great fun but I only use it occasionally,as for ground clearance I’ve no idea but when used it certainly firms the car up,as we know it’s not a sports car but it does put a smile on my face.I would say I’m glad I went for the F-sport as I like the looks but 9 times out of 10 I put it in drive and let the CVT do it’s job.