The tablet uses a quad core CPU. The phone has a dual-core CPU. Dunno how the clock speeds compare.

I have never had an iPhone/iProduct of my own to play extensively with (and don't want one, thanks).

But the GN phone I have feels pretty darned buttery smooth to me. There's a decent chance an iFruit might be "smoother", but that's could just be technobation. At some point, things are good enough, and the GN+JB certainly is.

Dunno about the tablet, but it's probably the same, just magnified (size).