You are right about the Maico in very tight woods, the 82 does better its geared a little bit lower. I still need to gear this one lower to work better in the woods.
The KTM 495 however is the trail version, first and second gear are lower than a normal 1st gear. First gear is so low its walking speed, so it's near trials bike.
I was considering getting a trials bike, however I have also heard that they are pretty fragil, if you ride them hard you can shred the gearbox like popcorn.