Call me crazy - help, drew? - but the lapels of the 4zip seem small than on the 2010, and the profile feels boxier. Maybe this is obvious and I'm just late to the 4zip game, but I think my 2010 draped better unzipped than my 4zip mdr does. Anyway, snowman, that could be why it looks so boxy - just because it is a little boxier than the other TOJ rider. I can see snow with an artishard rider or uncontrol rider or something equally minimal. But I guess he has the raf, so, hey.
Drew, are they that different at all? Or am I just making things up/viewing the past through rose-tinted glass?
I think it has to do with the design difference between the two. The 2010 has a scalloped hem and the buckles, which break up the silhouette and expanse of black leather, while the 4 zip had a straight cut hem and minimal hardware.