It would be my understanding that gets the same Name, EC, HC, Characteristics, Combat Attribute(s), Power, Support, etc. as the copy of Naruto that used it, at the expense of having no effect text. It's sort of a shame, because Senjutsu is effect text, so copying a Sage Mode would not get the Senjutsu effect for chakra. However, having a second Naruto who is that strong wouldn't hurt, and SM Naruto actually has Supt, so neither becomes a big 0. TBM Naruto, on the other hand, could get around a few irritating effects the original would have, and hit just as hard, though he seemed to lose Supt after he became Reinforcement cards, except for .
So yeah, an exact copy, minus any and all effect text.