By using gearingcommander.com I've been comparing Gen5 vs Gen4 to determine what changes I want to make. 1st gear didn't change at all and 6th gear baring changed but 2-5 did change.
Gen5 Gen4
2nd = 2nd with +3
3rd = 3rd with -1 +2
4th = 4th with -1 +1
5th = 5th with +3
6th = 6th with +1
With my Gen4 I ran +2 and loved it. With my Gen5 I like the stock gearing so far but I'll try +1 when I change the tires in the spring just because I have a +1 hanging on the wall. I think -1 +2 would be crazy on a Gen5 especially on the street.