On a mobile emulator like MAME4droid, the game shines for two reasons:
The community has also created like KOF '98: Ultimate Match (adding characters from 2002) and KOF '98: Anniversary Edition (rebalanced movesets). These run flawlessly on MAME4droid. kof 98 rom mame4droid
For pure KOF '98, is arguably more accurate. However, MAME4droid wins for features (cheats, save states, and support for thousands of other arcade games). On a mobile emulator like MAME4droid, the game