... and the YM is probably the more versatile one. I suggest you look at a steel Bathyscaphe with meteor grey dial as well, in case the dark grey ceramic case does not appeal to you.
By the way, I decided against the blue Bathyscaphe. I actually prefer the black ceramic since it looks less 'artificial'.
Enjoy making your decision, can't be a bad one with those nice options 
Cheers
Henrik