We have a good friend with a '16 Subaru Crosstrek. She's a huge Subaru fan, as am I. I used to own a '98 Forrester, and it is the only car so far that I regret selling. Before we bought our Renegade, we looked at a Crosstrek as well, but my wife was not a fan of the Crosstrek's styling.
Everything I read up about the Renegade vs Crosstrek matches what I've seen posted here. On road in rain, sleet, snow, slight edge to the Subaru- mainly because it can handle it all faster with little change in driver input. Off road in dirt, gravel, mud, and sand, slight edge to the Renegade (talking non TH models here, as we bought a limited). Severe off road and rocky trails, major edge to the Renegade.
I will say this: the Renegade OWNS the fun factor over the Crosstrek in any style of driving or terrain.
The bigger thing I see here is that in a market in which Subaru dominated for so long, there is finally a challenger in that arena that matches up to it far better than any of the offerings from Toyota, Honda, and Nissan did. The Patriot/Compass twins with 4x4 option started the inroads into that Subaru dominated segment, and the Renegade has now blown it wide open. Now Jeep has the 2nd generation Compass in that segment too. Brilliant move by FCA- combine the loyalty of Jeep Wrangler/Grand Cherokee owners while targeting a customer base that is or could become loyal to Subaru.