I like them both just fine. I'm sure I will collect both models but I think the one I'll use is the B1. It looks like it would fit perfectly as the model for the Klingon C5 before it got it's refits. Hmmm, there's an idea. How would you feel about making another version as a TOS textured model? (just thinking out loud here)
I just wanted to add a positive comment here because of the models you share with the community. Little by little, our options for assembling an even better model set is improving because of models like these. So thank you for your efforts.