Since the new HAP AC2 just came out, is there any compelling reason to get the rb750gr3 over it?
Looks like IPSec rate is good for both (hey, soho wifi router is an IPSec beast 
!), so I’d go for HAP AC2.
HAP is also has USB port only while RB750Gr3 has both USB port and MicroSD card slot.
Sd card slot, bigger ram, lower consumption, classical case.