Quick update.
Moved my rest a hair left and shot some more groups while off work over thanksgiving. 3 blade cutthroats, Sevr 2.0 and 1.0, and FP. This was all at 40 yards.
It definitely looks like my group from earlier with 2 heads was skewed by one of those arrows consistently grouping low/right.
GENERALLY, BH appear to hit a hair high and a hair left of FP. Groups are larger than FP by a bit too. I shot the same arrows/broadheads through summer and typically my BH group at 60 yards was about 1" larger than my FP group. I did not shoot much from September through October so it is possible that my form is contributing to the increased group size too.
Right now my plan is to nock tune some of the arrows that grouped on their own (mainly 1, 3, & 8) and see if they come in. Then I'll maybe slide the rest a tiny bit more left and maybe a tiny bit down. I'm the slightest bit nock low currently.
Like the other pics though, open to suggestions. I didn't pull any shots enough to where I'd want to discount them.
FP & Sevr
Fixed BH
Everything overlaid on one target