We’ll go over several different aspects including: File Size, Bridging, Positive Features, Negative Features, Overhangs, Slicing Time, and Overall Quality. The slicing settings were the default ones that were set by Astroprint for the Printrbot Simple Metal. The gcode used can be found here. The stl files used are provided at each section.
File Size: Slic3r wins
Slic3r: Average file size for tests was 2.8mb.
Cura: Average file size for tests was 3.4mb.
Bridging: Cura wins
Positive Features: Slic3r wins
Negative Features: Cura wins
Overhangs: Slic3r wins
Slicing Time: Cura wins
Slic3r: Took 2:21 to slice with default settings (with the exception of changing the layer height to .1mm)
Cura: Took 1:06 to slice with default settings
Overall Quality: Tie
Features: Slic3r wins
Slic3r: Slic3r has direct octoprint upload, more infill types, and more customization overall.
Cura: Cura has plugin support, and youmagine upload.
Overall Winner: Slic3r
I suppose there is a reason that Printrbot’s suggested slicer is Slic3r 😉 There are obviously tons of different settings that can be tweaked, so don’t take this as a final word. Thanks for taking a look!