The TSi is no longer available for custom fitting/ordering. Depending on how well the TSi was fitted and how the TSR can be fitted, the range of distance improvement can go from neutral to 30+ yards. If you want “the best”go with the TSR assuming you have access to good fitter.

Tsr2 is a big step up on TS2. Head over is poor and face marks up which I am not liking but otherwise it’s been worth it.

I went from a TSi3 to a TSR2 and the dispersion is tighter. Def get fitted.

I switched my TS3 15 degree for a TSR3 15. No comparison, the TSR 3 15 is longer, straighter and easier to hit. My current TSI3 9 driver is superior to my old TS3. I just picked up a TSR3 driver. I haven’t played it yet. I went by a golf shop and hit both the TSR3 and the GT3. My swing was probably off but I hit the TSR ok, the spin was pretty low. I actually didn’t like the GT at all. Again, it was probably because I was in street clothes and it was not a proper evaluation.