Don't have a HX Stomp, but do have a POD Go.
It really depends on what you're after TBH. They are both excellent pieces of equipment that will offer the user more solutions than they were aware they had "problems" for.
The HX Stomp is a compromise because of the footswitches & connectivity (compared to a Helix Rack / Floor / LT), but it offers the ability to have parallel processing (more than one chain of amps/effects/etc.). For extra footswitches, the HX Stomp XL is maybe a better option.
However, if you're after a "simpler" setup, amp/cab model, a few effects, but no parallel processing, then the POD Go is ideal. Same amp/cab/effects models as the Helix (IIRC, there's only 3 or 4 effect models missing), same great sounds, but in a gig friendly format. Been using mine for a while now, and it's excellent.
I was torn between getting a HX Stomp or the POD Go, and plumped for the POD Go, glad I did, because I think the extra features on the HX Stomp would end up causing more issues (constant tweaks & experiments, etc.), rather than working with the limitations and simply setting up a few great sounding patches, and then tweaking to suit.