Just tried a print in Duplicate mode for the first time on a new Epsilon W50. The model has lots of overhangs, but none over 45 degrees. Printing with Ninjaflex Armadillo (a rigid TPU), which can be a little quirky. I had to slow the printing speed and max out the fan to get a clean result.

What's puzzling me is that the two print heads delivered pretty different results: one nice and clean, the other with crappy overhangs. Vertical surfaces are OK with both.

Both hot ends were cleaned immediately before printing. The filament was a new and dry roll that I split in two for this print, so identical filament going to the two heads.

I'm having a hard time accounting for the difference