Like what for example? One of the things that sounded fun about cosmic is that each player has a different power. I really like games that have that mechanic.
If that's what you're looking for, then Cosmic Encounter is probably a fine choice. Some other games where each player has different abilities that I enjoy more:
Terra Mystica
Imperial Settlers
Eclipse
7 Wonders
Eclipse does take a
long time to play and 7 Wonders is ideal with 5, in my opinion, even though it plays as low as 3 and as high as 8 (with expansions).
What Cosmic Encounter does have over these games is the sheer number of different factions. It's unlikely that you'll ever run into the same combinations of races in any given number of games.