Derby extra vs. Derby Premium

[nemo]

I do not mind either of them.

Yep, both fine for me -- they do what they were made to do, cut whiskers.

 

[TOVT]

I like them both.

 

[DEgeezer]

I don't find a great deal of difference between them. Perhaps the Extra is a tad smoother.
Neither one is a top tier blade for me, but I can get a decent shave with either one.