Oooo,tough decision,both are bags I like.I would I think if I had the funds,go for the Muse.I'll get hounded for saying that on here!!!
But saying that,the Bays would make such a beautiful everyday bag,and as Kroquet says,the leather is just beautiful and ages so nicely.I'm not sure how a Muse would age,but I do love the design.Mmmm,tough choice.
Chocco Bays first,you definately won't regret it,I'll put money on it!! And then go for Muse in black nearer the fall/winter.Sounds like the best compromise to me!!! (of course by then you may be so smitten with your Mulberry,you'll want another one!!)
Lets us know what you decide,and enjoy choosing!!! xxx