hey i bought a set from the tuningleader seller based in germany, but it was for my mk5 golf, does the job, not the top notch but for the money they are ace
as for the other company, i think its the same coils just a uk based version, ie so he bulk buys or discounts for mass buying
i would reccommend for the actual wanting your car low, but not for serious comfort, but as i can tell, once your down it wont be comfortable with many lowering kits
just get some nice cushioned seats

lol
hope this helps with your decision