Hell yeah, awesome demo! They're both awesome amps.
Seems like my thoughts on them kind of match yours, too. The HR sounds like an idealized high gain tone with some extra clarity and zing in the treble/presence ranges, similar to what you hear in vintage Marshall amps. The MTL2 sounds like an idealized high gain tone with a more Recto / Uberschall style top end that's more balanced with the other frequencies and maybe even just a bit more crunchy.
Honestly can't go wrong with either one. They both sound incredible. The MTL2 sounds like a benchmark modern high gain tone, the measuring stick by which most other amps would be judged, and the HR sounds like it comes from the same place but tuned for just a bit more zing up top. Sounds like it's entirely personal preference which one any given dude would go for.
Also, man I'm sorry about the water damage, that's awful. Glad it sounds like you got things cleaned up though, that's great news.