Sorry for the late reply.
I tried out both, and returned the P2 Pro. While it does have a few better features it's absolutely not worth it compared to the T2S+.
The FOV is only a little bit smaller, but the freedom you get with the focus lens is amazing. With the P2 Pro everything looks a bit blurry if it's too close, with the macro lens you have to get extremly close, so mounting the cam to a stand and pointing it to a PCB from like 30cm is kind of bad. You see the general location that heats up but not what. With the T2S+ it doesn't matter everything is sharp and if it isn't, you can just turn the focus dial until it is, small parts are easily visible from a quite a distance, you can even get a lot closer compared to the macro lens of the P2 Pro.
Oh yeah, switch between macro and not macro on the P2 Pro is also annoying. Like getting a rough overview of what heats up and then putting the macro lens on is really finicky.
As for what the P2 Pro does better, its app is slightly better, I was even able to use an older version of the TC01 app and do an overlay with the phone camera. The range is slightly higher 600°C instead of 450°C, also when you select the wide range mode it went from 0°C-600°C with the T2S+ you only get -25°C~125°C and then a separate mode for 100°C~450°C which is weird.
The T2S+ has a lot of revisions, sadly mine is the A2 revision which does a bit of the processing on the phone instead of the camera, so when you plug it in to a computer you just get a green image and the software has to do some corrections. The P2 Pro (as far as I'm aware) is only available with the on-camera processing, so plugging it in a computer gives you a nice grayscale image.
I did send back the P2 Pro, it was more expensive for me and only came with the macro lens. The T2S+ was 20$ cheaper and came in with a holder mounting system, extension cables, and two extremely nice hard shells for the camera itself and the holder.
I wouldn't get the TC one, it's like the P2 Pro but bigger. In general, I think fixed focus ones are only really good for like rough inspections of buildings, especially with the slightly bigger FOV. But even here the variable focus of the T2S+ is really useful, I was able to see some details that were just blurry with the P2 Pro.