I have an original Beta 57. I keep it for 1 purpose... TOP OF SNARE. It has an sm57ish voice on snare with a Hypercard response that rejects the hihats well. I usually like to throw a sennheiser E609 side address dynamic gitar amp mic udner the snare to get some extra strainer crack/rattle (that nasal sennheiser really helps the Beta get the job done).
You can use this on other sources where great side and back rejection is needed, but it won't give you precisely what a 57 does. Its a little more hifi, but not in the same way as an Audix i5. These are cheap so its worth having one around.
I just adore this baby. I recorded so much material with it("Covek Peva Posle Rata", "Lov Na Vukove", "Prica O Zeleznickom Mostu" as a whole with this one). It works great with guitar recording, even vocal with some later plugins of course. I even carry it on gigs to sing on it from time to time.
try it on snare when recording, straight down at the rim, with something centered on axis on the bottom head like an i5 or a sennheiser 609 maybe and feel the might of the beta series.... the beta has its place. I also kinda prefer it on pinned 50+ watt amps versus a regular 57, if I don't have an sm7 or re20 and the amp is producing enough SPL and power amp distortion to liquefy small animals (as god intended) its between this and the i5.