Got a chance to test ride a Trek 8.4DS today, it was a nice bike and I would say very much like the Roam 2. They did not have the suggested 8.2 or 8.3 in either my size or in stock, so tried the 8.4.
One thing that was pointed out to me was that on the Giants, the cabling runs thru the frame which helps for weather protection. Whereas on some of the other comparable bikes some do and some don't. Has anyone really noticed if this makes a decernable difference in longevity?