

Their names are different in the American version, though the pink ghost's nickname was unchanged. They are also given nicknames: Akabei from aka (赤, red), Pinky from pinku (ピンク, pink), Aosuke from ao (青, blue), and Guzuta from guzuguzu (ぐずぐず, adjective meaning "slow" or "languid"). In the Japanese version, the ghosts' character names are Oikake (おいかけ, chase), Machibuse (まちぶせ, ambush), Kimagure (きまぐれ, fickle), and Otoboke (おとぼけ, playing dumb), fitting their behavior. This was likely done to avoid legal issues with Coca-Cola.
JR PAC MAN POINT VALUES PLUS
The version of Plus found on Arcade1Up machines changes the logo on the Coca-Cola can to "PAC", while the Legacy Edition cabinets simply feature a blank coke can.

(Source: The Arcade Flyer Archive, StrategyWiki) Revisional Differences

Ghosts are faster and more aggressive, increasing the difficulty right off the bat.The point values of eating an edible ghost are yellow instead of blue, and a "3200" graphic is added (see below for why).The maze is teal green instead of blue.For example, the first bonus item resembles a Coca-Cola can. Most of the bonus items (barring the Apple and Galaxian Boss) have been redrawn to resemble different foods.Pac-Man and Super Pac-Man's sprites are touched up, resulting in smoother and cleaner mouths.The sprites of the ghosts moving upwards also had their eyes moved down by 1 pixel. When moving horizontally, the Ghosts' eyes are one pixel closer together (a change also present in Pac & Pal).Vulnerable ghosts are now shorter and have a leaf sticking out of their heads(?).While fliers for Plus claimed it to be "A whole new game of surprises!", in reality it's just a small variation of the original Namco code. An "official" conversion kit released by Bally Midway in 1982.
