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Retro mainly because they've shown to be competent at making a great game with out Nintendo having to hold their hand through development and with out the rediculous delays either.
I give credit to Rare at their best we got Goldeneye and DKC, Retro are a young studio at around a decade old but have the Prime Trilogy and DKCR, in a straight up comparison Rare have released more game but have been around much longer yet Prime is the strongest game both technically and as a game compared to anything most companies have released let alone Rare no offence to them but Prime is just above their bar, DCKR has also been recieved well in a era when 2d is harder to please both critics and gamers. Rare had a lot of ambition and creativity but Retro certainly has the enginuity and discipline in pulling off their games I see Rare back in their days in a similar league as studios like Imsomniac while Retro seem more in the mould of Naughty Dog.
