I'm comparing an FR5 with another arm for bearing-sleeve loading. One demo used evenly spaced pockets; the other used our worn workshop tray with its awkward corner. Both clips look good, but I can't call the faster one the better arm when someone gave it an easier job.
You can't rank the arms from that comparison. Ask both suppliers to address the same parts, tray condition and accepted output, including replenishment and recovery; otherwise you're mostly comparing whoever prepared the prettier demo. The fixture and tool work need to be visible in the price too.