This is the same one I bought. $135 off Amazon. It’s working well.According to one of the links Eric provided on his vid, this DS630 is what he uses.
Depstech seems to be reputable, but their marketing is deliberately confusing. It’s fairly obvious they intentionally post, then hide, then repost different units here and there. Sometimes you can find information, sometimes you can’t. As you were saying, model numbers don’t mean much, and they’ll add meaningless letters before and after the numbers to cause obfuscation. I’m satisfied with the purchase for sure, but these guys are running a shell game.