i got a chance to compare both big 5's, the slight backset and the string follow, at 27 yards. couldn't tell the difference with 10.4gpp woodies. they both drew and released just fine, and grouped about the same at that distance.
iow, the string follow limbs held their own against the slight backset limbs at a 27 yard distance - that is, there wasn't an increased trajectory that required my 'gray bowsight' to recalculate the bow hand hold for both bows.
not at all a 'controlled scientific' test, there many parameters left to consider testing, and i'm sure some differences will surface over time. just nothing glaring after flying almost 70 arrows from each longbow.