The difference between SAT Subject Math II and regular SAT Math

I’m a bit confused as to what the differences between these are. I’m not even sure whether there’s something called regular SAT Math… If I prep for Subject Math II, would I also be prepared enough for the regular SAT Math?

They are very different. Sat math II (the subject test ) deals with harder subjects such as Alg 2 and PreCal. However, in my opinion, regular SAT Math is more difficult than Math II, since Math II is more direct. Practice for both separately to achieve the best result on both.