Totally Philodendron. Looks a whole lot like P. scandens or whatever they're calling it these days....
Yeah, I've been looking at stuff on like, and it seems pretty straight-forward. The leaves of the dark green Pothos and this Philodendron DO actually kinda look different enough that it makes me think I'd be able to tell them apart now. So.... go me? Heh.
yup, that's the absolute beauty of these plants...you 'end up' with a totally different one once it starts to morph!