We sell both these wheels where i work and i can personally vouch for the kei force 10 as my girlfriend has 18's on her mini,
They are a very very tough wheel as they have 35 profile tyres and she's hit loads of potholes, they spin up round and true no buckles bends or dents of any kind,
The team dynamics are a totally different kettle of fish, its ok saying they are ok for the btcc but they are a totally different wheel made from magnesium alloy and cost around 4grand a wheel,
The retail ones are a cheap casting and we have had to send a few back as the finish was shit, we have had no end of trouble with the quality of rimstock stuff lately so i would steer clear,
Hope this helps and if you want a price from us just call the pitstop on 01484 455665 ask for Malc,
Check out
http://www.the-pitstop.co.uk/ if you look in the gallery you will see a couple of cars on the force 10's.