Which alto sax should I buy?

If you can, play test them and see which one is better. If you can't I'd recommend the Bundy II. They're both good student instruments, but in my experience Bundy II's are more reliable. My own Bundy II lasted me over 10 years, and I just sold it after it had been sitting in the closet for a few years...I'm sure the new owner will get many more good years out of it.