I would have a go on Boll’s 250 if you haven’t already and see if the difference in power is something you can live with. Not just down the street though as that is when you will feel it the most, but in the bush.
When I changed from my TT600 to the DRZ400, I felt a drop in the power when I nailed it going down the road but when I got in the bush the DRZ felt more powerful because it came on quicker (admittedly the TT was getting long in the tooth and in need of a refresh).
I also used to go from riding the FE550 to the DRZ400 without being disappointed with the power difference, mainly because the DRZ was so much smoother and so more comfortable.
How did you enjoy the TTR on the weekend, did you enjoy your riding any less?