Which line for a mainsheet

[Brion Toss]

Hi again,
Oh that Apex. Samson adds Spectra to the mix, hence the lower stretch. Likely as pick-vulnerable.
As for the two-speed configuration, you can rig 3:1/6:1 to have the lead come off the boom, in which case it will have only 5 sheaves, and those can be quite smooth-running. But even with the lead off the deck you might have a lot less friction than your current setup; much depends on bearing quality and relative rope size. I haven't seen the boat, but I usually would prefer the from-deck version, as it usually gives a handier belay.
Fair leads,
Brion Toss