There are far more diverse fighters and esp strikers in SW than BW. Waterson, Rose, Joanna, Calderwood, Grasso, Angela Hill (who mostly likely will come back to UFC), Karolina, Valerie...just to name a few off the top of my head. How many can you name in BW??? BW is filled with ground fighters with striking coming second...a far second for the most part. BW looks far much more primitive than Women's SW.
I'm likely just not a guy that singles out WMMA like you do. I have no problem watching Invicta.