I happen to own both mics, as well as the much more expensive B.L.U.E. Kiwi. The Baby Bottle is a somewhat "colored" mic, and the somewhat darker of the two. The Bluebird is more transparent, and a little brighter. I prefer the Baby Bottle in general, particularly as a vocal mic. It shines on female vocalists and violin. The Bluebird I prefer as an instrument mic, particularly on acoustic guitar. It is also pretty good on voiceovers. For your applications (vox and sax), I would probably choose the Baby Bottle. YMMV.-Richie