The product names probably won't be a significant differentiator to most people, but it's hard to imagine anyone using "Galaxy Buds" in a normal conversation. Can you imagine saying, "honey, have you seen my Galaxy Buds?"
Wireless charging is a big deal, but the shape of the AirPods case is much more practical. It's non-bulgy, for those of us who carry the case in our front pockets. No one wants someone to think, "does that guy have Buds in his pocket?," Galaxy or otherwise. It's also easier to hold the bottom of the AirPods case when getting the headphones out, which is important when on the go.
All that said, Samsung people will choose the Galaxy Buds (a name that makes me cringe even when typing it) and Apple people will choose AirPods, so despite their differences, this boils down to an equalizing move by Samsung.