If the question is what episode is better Trek then i'll vote Darmok.
Darmok is one of the best episodes that shows the Star Trek principles and if i'd have to chose a single episode to show somebody what Trek is about i'd place Darmok very high on that list.
Trials is "just" a fun romp.. a tribute to TOS which started it all. It's for the initiated fans much like most of Enterprise's 4th season was. It was a very good episode but you could only really appreciate it fully if you are already a Star Trek fan and know the background a bit.
As has been said.. the comparison is somewhat off. Apples and Oranges.