There are two issues here.
Both claim to be 44.1k FLAC files, yet the first graph clearly goes over 22KHz... which is, if not impossible, rather unlikely. Technically, it could all smooth out before it reaches the limit at 22.05, or it could all brick-wall, but we can't see that from the chart.
You cannot judge anything except very basic frequency content from a spectrograph. Most of the information is well above where a simple listening test would differentiate & the top ⅓ would probably only be heard at all by people under 18, on exceptionally good speakers.
Except for pathological cases, diagnosing song quality from spectrograms makes about as much sense as diagnosing supermodels by blood sample: some basics like "rather anemic", "discolored or bloated face" may be discoverable, but overall it says rather little about overall quality and basically only provides pointers to rather fundamental features. Which is fine when those are what you are looking for but not of much help otherwise.