ORIGINAL: BanditMonster
There is just no comparison between Deans and Tamiya; the Deans are simply a must. They are far more reliable, and yes you will notice a difference in performance in both duration, and power. The deans are basically far more efficient, and let more amps go through them, giving your motor the sufficient amount of power rather than being limited by Tamiya connectors.
Not only that, they are easier to get part then the Tamiya, no lame latch.