Quote Originally Posted by cliveh View Post
has slight under exposure, but developed with sufficient contrast, is the snap of a print produced on a condenser preferable to one produced on a diffuser.
Condenser enlargers generally give higher contrast. If as you write your contrast in the neg is sufficient (i.e. 'normal' for your process) then you don't need more contrast than you normally would so using a condenser enlarger will not offer an advantage from that perspective.

Unless you underexposed by more than 1-1.5 stops then you should not worry about compensating for any compression/reduction of the (local contrast) in the shadows. If OTOH you did under expose by too much then a condenser enlarger won't help you anyway.