Make the trade it sounds like thats the way you want to go. I agree The R seems physically smaller and I think the lower narrower seat helps with this. The Ten should have a slightly narrower seat and tank set up and it would feel much smaller.

If you are really enjoying the off road then get something much smaller and lighter. A 250 yam will give you all the fun you ever need off road and you will feel like a riding god. There are so many riders out there that think power power power but after a full day in the saddle off road most would have been better off on a smaller lighter more tractable bike. They are less tiring to ride

Whatever direction you choose have fun.

How about using the Beemer ? they aint half bad off road

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Ride On :tenere:Camel 2008XT660Z
harvey mushman did it in the dirt Uma 1994 TT250R