More than a comparison between both, I'm sorta looking more for advice from you guys, please. Comparison would be nice too, lol, just to make sure... 
I wanna track some scream vocals and I wanna get a cheap mic to do so. So I thought that in my budget range, there's the SM58 and SM57. I've had better experience with the SM57, and it would be cool to get it so that in the future I can track guitars from real amps and such, so... yeah, between those, I think the 57 would be a better option.
But then I remembered about the Beta series. So I thought, would there be any advantage to getting a Beta 57A?
Please keep in mind that mainly, I wanna record vocals with it, and secondly, thinking more about the future, possibly guitars too. So which one do you think will get this job done better? Why?
Thanks!

I wanna track some scream vocals and I wanna get a cheap mic to do so. So I thought that in my budget range, there's the SM58 and SM57. I've had better experience with the SM57, and it would be cool to get it so that in the future I can track guitars from real amps and such, so... yeah, between those, I think the 57 would be a better option.
But then I remembered about the Beta series. So I thought, would there be any advantage to getting a Beta 57A?
Please keep in mind that mainly, I wanna record vocals with it, and secondly, thinking more about the future, possibly guitars too. So which one do you think will get this job done better? Why?
Thanks!
