it's not as easy as some people make out
Hahaha.
I'm not sure your in a position to judge that - since you haven't seen the standard of a UK IR.
JAA is much more procedual and by the books. RT has to be at a standard considerably higher than in the states.
Most places sell the courses as 10 hours sim, 10 hours aircraft. Although everyone I knew converting (unless you are well above average) went over this, as primacy (principle of what learnt first, sticks) can be really hard to beat. Believe it or not some spent more than the traditional IR due to doing a lot of hours in the aircraft which is big money in the UK.
However, if you go in willing to adapt and learn and accept that's a different kettle of fish rather than resisting it - it should be OK. (Most say they will, but then gripe and moan all the time). Good Luck!