With the new Lightbringer song, there's a huge question

From what I can see, there's a lot of debate over who the lead guitarist of Pentakill is. Quite a few say it's Morde because obvious reasons. Being the face of the band (literally in the case of the album cover) wouldn't normally fit a bass payer. But then Pentakill Yorick is inspired by Slash who's a lead guitarist as well. From what I can see, both of their guitars seem to have 4 strings which would almost indicate they're both playing bass.

With how much I know I'm going to see the question brought up, it would be nice to have an "official" answer here.