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The 18-55 IS II is supposed to be a cosmetic upgrade only compared to the Mk. I IS version, so that review page should be applicable optically:
Regarding the other reviews, there are some stale ones up there, but if you want to learn more about the 18-135 and 18-200 there are many places to research them. The Digital Picture, SLR Gear, Photo zone, Camera Labs, etc...