In my .69, I found 3F to give slightly lower velocities than 2F - both GOEX, all the way from 82gr. on up to 6 drams (my 6 dram measure throws 165gr., rather than 163.8gr.).
I do think the 3F kicks more, though cannot be sure.
This is 140gr. 2F GOEX in this rifle. Taylor caught the firing picture at almost "full recoil".
Note that this gun design, drives the shoulder down as well as back. This direction of movement, down and back (the elbow has dripped in recoil) tends to raise the cheek off
the stock, rather than smacking it.