In my opinion, the THR is by far the highest quality modeling in this form factor. It’s not even in the same ballpark - every amp on it sounds amazing. It also works great as a stereo speaker.
However, it’s probably the least feature full of the options. The on board effects are limited (but what’s there is excellent) and you can’t use custom IRs. The app is not great, either.
Also, the headphone output sounds really bad. There are some discussions about it on the Yamaha board and it seems to be a controversial opinion, so you might not have a problem with it. For me, it’s unusable. But the amp sounds so good at low volume that it hasn’t really mattered. And by low volume, I mean you can watch TV at normal volume while playing guitar.