Your talking about the street legal WR250R Yamaha? I dont know if Id want a 300 lb 250 trailbike. I know guys love em to death but that's more then my 530KTM weighs. If your a learning trailrider there are better bikes then both of these.
The KTM is like a racebike,the WR is a bloated cheaply built econobox dualsport. Ive always ridden 2 strokes in tight woods,light and simple to work on. Honda quit building XR's so they dont have much to offer anymore,their 230 is a real heavy cheap bike but some guys ride em anyway.
Try a 200 or 250 2 stroke KTM and see what you think.
A used clean XR250 is a great learning trailbike.
Some bikes around at times