Point is:
If they list Pong, they gotta include ALL Pong clones or just the Atari originals.

Odyssey is different, as it has a numerous variations of games, not just Pong, there's gambling (Roulette), sports (Ski), space (Interplanetary Voyage), warfare (Invasion), education (States), puzzle (W.I.N., Percepts), etc...
Of course, after Odyssey, Magnavox did Pong clones too.