yes, the CLK has a wider field but it isnt a ton wider. I tried on T1's and liked the fit but i like the fit of the CLK more for my face. I think the T1's lense changing is a disappointment, I assumed they would change out similarly to the I/O's because of the tabs on the frame but they are very much like a traditional lense changing system.
However most people dont swap out lenses throughout the day so it is kind of a non-issue. I am anal retentive and get annoyed if i dont have the right lense in for the conditions.