the weird thing is im better at the logs, rock faces.... on the 500
with a trials bike you have to use the correct technique (precisely timed suspension weighting and unweighting) to get over stuff, where on the 500 you can close your eyes and pin it and its got enough power to launch over/ plow thru pretty much anything
after hearing how magical trials tires are im not impressed, its really good on rocks and feels like this everywhere else, and when you break loose it feels like neutral....

i wouldnt run a TT on a enduro bike if you paid me
the 450 will have less power and will be harder to start, and will be heavier, but to make up for it it will require more maintenance.
4stroke=dead fish