The engines are identical except for the long output shaft on the TW, and I believe the carbs are different.
The XT225 is super easy to maintain...just like the TW. When I had my 07 jetted just right, she could lift the front wheel at a traffic light....but as I don't like to do wheelies, that didn't happen often.
Supposedly, the XT225 tank will fit the TW.
Unfortunately, the XT wasn't a good fit for me. So I sold it and its bigger brother the XT250.