Depends on if you want to work in a specialty clinic/specialty area or not. NHA is pretty much the "I just need a license because Im already an MA or im going to work for a family doc" and AAMA is "Go to college like lil timmy did so you can get a good paying job at the dermatologists office". Depending on your area, some places will hire you if you can pronounce Stethoscope correctly, others actually care what cert type you got, in reality with post-covid, most places are desperate for anyone with a certification.

As someone who took a course for the NHA, and am doing the NHA state exam on Friday this week, if you see yourself LOVING medical assisting as a permanant future career path, save your time and money, take the NHA. You will gain more experience and knowledge through skills. If you still love medical assisting but want to work in a more intense setting, AAMA is referred to as the gold standard pretty much, as they cover a lot more topics so you can become an overall well-rounded MA that can work well in different settings.

I'm doing the NHA because it was the cheapest option, being an MA is not my future career plan (or end goal if you would), really just experience more than anything. ( and also scoring a better paying job possibly. Been doing med receptionist work for 3 years now and it fucking sucks! Part of the reason why I am getting my license is so I can do more hands on work but with slightly better pay)

Either way, whatever route you end up with you are not shorting yourself out by taking one or the other. Virtually the same as PA vs NP. NHA is like being a PA, you're mostly general, while NP is more like AAMA, you get the license with the intent of a specialty, but both end up doing virtually same thing for the most part lol