i tell ya what, when area under the curve matters, he's a direct look at it. having driven both, the 4cyl does feel faster/more bite, while the v6 comes off the line better and is generally i found nicer to drive. that said, i'll take my stock LQ4 TJ 13 out of 10 times.
2.0L VS 3.6L (WTQ & WHP)
2.0L - Blue
3.6L - Red