The very same.
Too bad we never got the original series because it was too violent for 1980's audiences and one of the characters was a Nazi (which is why they stopped showing it in Europe).
But those little guys were all we got of a kinda popular Japanese manga/anime from the 80's... remolded little Gatchapon figures. Surprised Mattel didn't commission a bad M.U.S.C.L.E. cartoon themselves. Looking at the Madballs cartoon, I'm happy they didn't.
But yeah, Bandai (the company that made the original figures in Japan, and most of their toys at the time) BUNGLED the Ultimate Muscle toy line in the US, and it never became that popular. They didn't have any randomly inserted toys, and each set you buy had the same characters in it, depending on what number the set was. Just, one character could be metallic. So basically, they redid the Japanese toys the Americans didn't get, and didn't attempt to recreate the original line, which would have at least appealed to the older collectors that had the toys when they were kids.