Bleh, I was wrong, according to more recent translations, Naruto's newest seen Rasengan is a real new one. It's translated by OneManga SleepyFans and it translates to:
Sage Art: Cho Odama Rasengan:
http://i8.photobucket.com/albums/a5/Vajra000/05.jpg
Here Naruto only uses Sage Art: Odama Rasengan,
http://i8.photobucket.com/albums/a5/Vajra000/10-2.jpg
so yeah it's a big difference. Cho translates to "Super" or "Ultra" and of course Odama means "Great" or "Giant." So basically Naruto used the same Rasengan this time that Jiraiya used on Preta Path. Jiraiya never said "Sage Art" before he used his though, but it's implied that it's the only way he made it so big...
But yeah, Naruto's newest rasengan is about x2 the size of the ones he used on Pain's summons, it might be the fact that he split the rasengans into two hands vs two summons so the size was also split too? Anyways who gives a tit, it's nice to see he has the same move as Jiraiya when he uses it solo.
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