To be honest, I don't know what it is, but I'm finding that I vastly prefer a steel frame. Yeah, the aluminum/carbon fiber was nice, but I like feeling like I'm pedaling an actual vehicle. Does that make sense? I don't know, haha. I just like the sturdiness of it.
This bike's ride is a bit bumpier too, bu that's okay. THe main reason I sold the Allez and got this was because I wanted a bike for transit, not necessarily speed. So far I'm thoroughly enjoying it. It's my first bike with friction shifters too, which is different, but I enjoy the intuitivity required versus the preset indexes.
Only thing I miss is the triple chainring (I live on top of a massive hill)