It’s probably just me being pedantic, but Chrome is not really a browser for iOS — it is merely a front end.

iOS/Apple do not allow other browser Apps, but they do allow apps to use the built in Webkit engine, so although the ‘shop window’ looks like Chrome and gives you some of the nice features (like sync’ing) it still uses the Safari Webkit engine to surf, including the Javascript engine. So in theory it should be no faster, or not much slower.

It will also never have all the lovely Chrome add-ons, but for me the big plus is the fact that I can sync my bookmarks easily with all my devices/Macs :-)