I have one year of experience with heresphere (without knowing all the detailed settings) and have been using the DEOVR player for two months now because of SLR.
I'm really a normal casual user, so I can't say anything about the thousands of settings in heresphere that might be better than DEOVR. But what I find better about heresphere is the perspective setting. If I want to adjust the scenery to my lower body, it's much easier and much more intuitive with heresphere. This is sometimes a bit more complicated with DEOVR. First of all, you have to aim precisely at the button at the bottom right, whereby the bar is sometimes slightly outside the field of vision. Then it doesn't always work when you try to hold this button. And if you want to move the scenery, the bar is often in the field of vision, so that precise positioning of the scenery is not possible due to the restricted view.
All this is much easier with heresphere. You just press the trigger button and move the scenerey as you like.
(I use Quest 3s standalone)