I haven’t tried the pE tracker but my good friend has one and we’re talking. From what I gather, I’m delighted with the M8 for it offers 3 columns for fox commands on top of note/volume/instrument (volume uses one of the fax command columns on the PE), the song page front and center with arbitrary length of phrases and chain for each track, tables (and now aux tables)… plus the synths of course.
Not in the same league - M8 is a complete box where people make full songs easily.
Just one opinion