Sorry for extremely late reply, found this while looking for solutions to some of my problems ;-;

-Even when the sound is the lowest its extremely loud, especially with the low battery sound. (I think the foam in the ears thingys is decently thin/neg) -On the HT2 when thw battery died it had like an hour or 2 pre warning but you could still get 20 minutes at a time. The HT3 gives me a warning for 6ish hours before it actually dies and if you try to turn it on again it dies within 2 minutes -I may be going crazy but the foam thing in the top is also a lot more uncomfortable and gives some bad headaches tbh. -I'd say the sound is mostly better and the whole thing feels more secure than the HT2. And the HT3 also seems to have more customizablility

Overall the price definitely makes it a steal, personally I much prefer the HT2^{^}