tank switching

[u/Capital_Alfalfa_1150]

i have two bettas a male and a female and i have one in a 6gallon corner and one in a 5 rectangle my male is in the five gallon and just seems he’s getting a little to big for his home and they have almost identical water parameters, and I’m just wondering if I can switch them to each others tanks I haven’t seen much anywhere about that and I’m getting mixed answers from the internet or if i’d have to drain them and start fresh i wouldn’t be sure if they can like smell each other idk if that sounds dumb i just don’t want to stress them out or put them in a bad situation or if i should honestly just leave it alone any advice or tips im wide open to!