This is the all black version originally released for the DTL series. Functionally, there is no difference between this version and the black/silver version, the differences are only cosmetical.
I haven´t had a chance yet to compare this lens to the other standard lenses available for the TL/DTL series. I will post my findings as soon as I get a chance to do the test.
I tested this lens recently, and the optical quality is superb and already excellent wide open.