I do haffto ask, why would I use another Webkit browser in OSX, when there's a perfectly good one already there?
They're both pretty much identical in Javascript speed, Rendering speed, both have the concept of Sandboxed Tabs (Snow Leopard Safari 4 does atleast), and at this moment, both lack Extensions (although Safari has them unofficially, and Chrome will have them). Both have the same UI style, although Safari looks better with stuff like Top Sites being rendered as a 3D board (as I've always wanted a massive screensaver in OSX, that does exactly that, but with album art..).
They're the same damn browser basically in OSX... Seems a stupid effort IMO.