I always thought that Mame was for the old-old-large-grey_beard-old-school games from around 1980 (i.e. Pac Man, Donkey Kong etc.). That is: for people my age. Grey old people, ha ha! Those games were developed in the time that Capcom may even did not exist yet. Those games were the games that companies like Nintendo (Donkey Kong), Sega (Zaxxon) and Namco (Pac Man) started with. Before they went into the home gaming market.
Capcom released a few Play Systems (CPS). The first 2 can be emulated w/ the Dingoo. Capcom is best known for the 1 on 1 fighting games from the 90's in the arcade halls. Sort of the same thing goes for the Neo Geo. But that's how I see it.