The two powerhouse fourth-generation girl groups, NewJeans and aespa, both released new albums in the past week, with a few days of difference in between. NewJeans | @newjeans_official/Instagram aespa | @aespa_official/Instagram While NewJeans have delivered a fresh sound, rehashing Y2K once again with the How Sweet EP, aespa unleashed an edgy, “hip” sound with Armageddon.…