I have always found XLR connectors to be more reliable than jacks.

And I always use balanced interconnects if possible, no matter what the distance. I figure that the improved noise immunity will probably help (although I must admit that as all my audio plumbing is less that 15 feet I've never experienced noise breakthrough on unbalanced cables), and also I get another excuse to XLR interconnects!

And to actually answer the original question, under optimum conditions there should be no difference in performance whether you use TRS or XLR connection. Personally I believe that optimum conditions would be maintained for longer if you used XLR connections.

(later edit: I really should read what I write before pressing submit. My comment in the second paragraph about improved noise immunity is with reference to using balanced audio rather than unbalanced audio, and this wasn't the question being asked was it?)

[This message has been edited by MacAllcock (edited 05-06-2007).]

[This message has been edited by MacAllcock (edited 05-06-2007).]