What kind of betta do I have?

Just curious. I know bettas have different kinds which I’m yet to learn the names of.
What kind of betta do I have? excuse my terrible tank. Rn have another bigger tank with Monte Carlo growing in there. Then I’m gonna make this SpongeBob tank a nice planted one as well

those are both betta splendens, probably both female
i'm not very familiar with betta strains though...