Hmm lets compare...
Bots: iSRO is "crowded" with them. cSRO has bots yes I will admit BUT, you can still solo grind and NEVER get ks'd.
Servers: Always open on cSRO, never crowded.
Nice Players: cSRO people are always very nice.
Powerleveling?: In cSRO everyone helps each other level, sometimes for free

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Is it hard to register/play cSRO: Pretty much no different than iSRO's.