The only true guarantee you have against boots is to look up the NGH number of the ROM chips on the boards. NGH-044 is Art of Fighting. This is important to do look up because some boots have a mix of Mask ROMs and EPROMs, where the Mask ROMs go unused and the actual game is made up of EPROMs.
If looking up NGH numbers is too much, you can also determine a boot just by looking at the P, M and S ROMs. There is only one slot for M and S on any SNK board and I've never seen a game with a dummy P ROM still installed. So even if the V and C ROMs are a mix of EPROMs and Mask ROMs, there won't be a question that the game is a boot.
The occasional game with a EPROM for S1 and P1 (or EP1 and EP2) and the rest is all Mask ROMs is just a repaired or code revised game.