I cant tell you first hand, the Deans connector and Traxxas are virtually going to have the same low resistance. Both are constructed of gold plated posts that are very heavy, and both use the same spring type system to keep the connections solid. I'm a heavy Deans user, have been for years, and just recently soldered a set of TRX plugs on. I can tell you the pros and cons are:
Deans-smaller overall plug, can be reused, cannot be plugged in reverse, but can be a pain to solder if using heavy guage wire.
TRX- Extremely easy to solder to with heavy wire, cannot be plugged in backwards, a little larger than deans but no heat shrink is required, but connot be reused once assembled.
Its if though Traxxas took the deans plug and took the best of its features, and made it almost foolproof to solder them up and assemble correctly. They even took the extra step to put "wire side" and "A", or "B" markings on the posts and the actual housing for assembly purposes. I'd say it took more time for the iron to heat up than actually assembly time.