For the love of all things great and small...
Saints Row IV did not START out as DLC. It was being developed as it's own entity after SR3 released, and then in a final response, the elements of the Enter The Dominatrix DLC meant for Saint Row The Third were absorbed into main game, which then was changed around more to cater to the newfound posibilities of adding super powers. The ETD mission pack AS IT WAS MEANT TO BE on SR3, is being released as the first expansion for SR4.
No I'm not linking references to site my statements...do it for yourself.
That said, the only similarities between GTA and SR are that they're open world sandbox games at this point. Volition intentionally veered away from being like GTA which was the primary complaint of SR1 and 2, and when they did (surprise, surprise) people complained about it being too UNlike GTA (tongue in cheek, unrealistic, slapstick, etc.) I swear some people just need to stop playing video games and find some hobby that actually entertains them rather than stick to one where whether things go one way or the other they're still going to ***** about it.
Which one I prefer...different games, different styles. So yeah, both. Am I SUPPOSED to like one over the other? How about enjoying whatever game I choose to plunk out money for regardless of whether or not it's similar to something else?
(The preceeding rant isn't aimed at anyone in general.)