Hi Car,
I've owned a Sherco 2002 290 and now a Sherco 2006 250.
The 290 was my second Trials bike and used to feel it far too powerful for me. But by the time I got the 250 I had leanred better clutch control and that's really the key to power control on any bike.
I do have a personal preferance of a 250, becuse it revs up a bit quciker from idel. But in reality if you become the "master of the clutch"...there's no bike you can't ride.
In comparison I have a 2002 Beta 250 in my garage too. The so called "smooth power delivery" results in a engine that's a bit slower to wind up...and I keep missing that small pop of power you need to ride down a large step. Which results in the bash plate hitting on the way down. But it's all personal preferance and "horses for courses"
But clutch conrol and Trials go "hand-in-hand"
Best of balance.
Neo