Greetings! This is a small heads up for those who are unsure which category to post their run in. As you've noticed, there are several categories for this game which all look the same. Thing is, there are three versions of King of Dragons, and all three have big differences in terms of gameplay and speed, hence why there are so many different leaderboards.
The original leaderboard was for the Super Nintendo port, which is the most popular version, but since, the Arcade Rev. 1 leaderboard was added, and just recently the newer console versions, such as the Switch/PSP/PS2 version.
The Arcade rev. 1 leaderboard is for the first MAME version which was released exclusively on arcade (910711 WORLD). This version (used to be) the fastest due to many differences to the health and number of enemies.
The Arcade rev. 2 leaderboard is for the second MAME version (910805 OR 910910 WORLD), the Switch, PC, XBox, PSP, PS2 and PS4 version available in Capcom bundles. Those are all based on the same ROM, which was the final revision of the arcade cabinet.
The Any% leaderboard is for the Super Nintendo version, which is based off revision 2 of the Arcade version with several differences to accomodate the SNES hardware. It is the slowest version, but also the most popular to run. Specific emulators are allowed, namely BSNES, Bizhawk running a BSNES core and Higan.
Make sure to post in the right category depending on which system or arcade version you are running this!