With the Diversion I never ever sat on it to get it in and out of the garage I always pushed it in/out!
There is no difference in the practical tests at all apart from the bike you choose to do it on and therefore the licence you get once you pass.
Cat A1- An engine capacity not exceeding 125cc
A max power output of 11 kW (14.6 bhp)
Cat A2 - This licence allows you to ride any motorcycle with a power output not exceeding 25 kW (33 bhp) and a power weight ratio not exceeding 0.16 kW / kg for two years.
Cat A - A standard motorcycle licence and can ride any size bike.
The fee is the only difference, the fee, Cat A is slightly more money.