Brushless motor worth it?

[condor11]

I am currently running an 80T brushed motor (RC4WD) in my truck. It pulls fine, I don't carry heavy loads, just a trailer with some reasonable stuff.
Trying to see if I can get longer battery life and also smoother startup - currenty when I ease on the throttle the truck jerks a tiny bit, which is annoying. Perhaps on a sensor-ed brushless it won't do that?

Is it worth it to install burshless motor? Will I get longer battery life?
Also are there brushless motors that would give comparable torque to an 80T brushed motor? I'd rather not install gear reducer unit as I don't use one now.