I spent several weeks alternating DW and Ti Fargo for my daily ride. It was interesting to ride the same trails and roads back to back. What I discovered was, the DW with the 2.8 tires and 45mm rims excels on almost every surface and scenario I put in front of it. The on-road performance was marginally slower for the DW, but when I added a few PSI to the bigger tires and once I got them rolling, it was nearly as swift as the Fargo. Accelerations are slower.
What I also noticed was, the more I rode the DW, the more disenchanted I became with the off-road performance of the Ti Fargo. It just felt too compromising on singletrack. So, I ended up putting 2.0 tires on the Fargo making it even MORE adept on gravel.
I think it just boils down to my desire to either use a bike for its intended purpose and not screw around with it, or to set up that bike and use it in a way that amplifies its positive attributes. This is why I don't put standard 29er wheels on my Beargrease. Or why I don't put low profile tires on my Jeep.
I try to maximize the design of a bike, not wiggle my own funky interpretation out of it. I also ride my bikes bone stock anymore. It's just easier.