Here’s an awesome video comparing the Archos 605 WiFi with the iPhone, posted by Greg at generationmp3.com:

Archos 605 WiFi and iPhone perform similarly for pictures and music but Archos wins since it has got the better and larger screen.

Archos 605 WiFi performs certainly better in terms of video playback since it has better screen, better codecs and Internet video compatibillity.

The browser doesn’t necessarilly seem faster on the iPhone, other than for scrolling when the snapshot of the webpage has been downscaled to an unreadable 320 or 480 pixels width. Basically you have to zoom in on anything that you want to read or click on using the iPhone’s small browser screen.