Bikini Warriors, Kono Subarashii Sekai ni Shukufuku wo! Recommendations
Parodies of fantasy roleplaying adventures where the female party members are all comically flawed. The lead character is smart enough to realize how bad things are, but often just as bad. Both series feature a lot of sex based humour, albeit Bikini Warriors is a short and doesn't have much else where KonoSuba does.
Genre parodies and self-aware self parodies set in a fantasy world with RPG elements. The raid party is flawed and frequently fails, in a hilarious way. Both series also have large breasted blonde character with masochistic tendencies that is trying to get herself into humiliating situations.
High fantasy RPG parody with lots of ecchi moments. The humour and jokes they employ are very similar.
KonoSuba is less ecchi and has a generic shut-in NEET MC, whereas Bikini Warriors by passes have a tsukkomi altogether to present all the RPG parody goodness with a healthy cushioning layer of enormous breasts.
Parodies many of the tropes of RPGs and the fantasy genre, both follows a group of adventurers who have several weaknesses and are low on funds. The majority of the time their adventures end in failure or some kind of mistake, but still will have moments of success.
The most prevalent difference is the episode lengths, Bikini Warriors is 3 minutes per episode while KonoSuba is full length. Although both series have fanservice, it is more ridiculous in Bikini Warriors, as it's almost the basis of the show, but still of similar quality as they both share ecchi of the slime and monster variety.