LS vs small block

[WyattTX]

I notice everyone seems to be doing ls swap nowadays. They are great modern engines, but this has me thinking. How would the best small block with the best EFI system, and paired with the best drive train, compare to a ls with all the same items? What would be the better engine if both were carburated? Does the ls aniquate the small block? These may be a dumb questions to some, but I would not call myself an expert, but rather a novice willing to be enlightened. Thanks.