Eh, I used to think that but I honestly don't see much difference between the two in terms of image quality now. They seem the same. Obviously if you download the videos to your comp or to Quest itself its going to be the best, you will always lose a bit of quality over internet connection, but not that much imo, at least not with my internet.
Heresphere is really good in so many ways, but it's missing some stuff that Deo has.
DEO - Passthrough with really advanced options for creating your own PT settings, much easier to use, much more user friendly and huge library to stream through if you pair it with SLR. downsides is it's still very slow, clunky, and some of the controls don't make sense (like having to grab both grip buttons to move the image), and the other settings are drastic. It's not easy to make super tiny incremental adjustments.
HS - Much faster, cleaner, more options to adjust settings, settings are super incremental. You can zoom out like a millimeter or even less, so way more control. But it's also confusing as hell to use, has way too many menus and options that most people don't need, don't use or don't do much. No Passthrough is a big problem as well. I pretty much only use DEO now because of that. He's working on PT for it, but unless it's superior to DEO's, not sure I'd switch back.
I still use both everyday depending on the videos.