RS-540 Sport Tuned

Hi, im looking for some cheap fun that i can also hop up when nececarry, so im buying a Baja King *decided to go 4wd, so im not getting the super hornet*.

one thing im looking at doing is upgrading it pretty quicky, so i was looking at the cheapish Tamiya RS-540 Sport motor...

now for the question. If anyones experienced in this, who knows what difference there is between the stock RS-540 and the RS-540 sport tuned.

also if theres any other cheaper but decent hop ups you would reccomend tell me *its the TL-01B chassis*

oh edit: does anyone know if the stock ECU/MSC will take the sport motor over the stock 540?

do you know what the turn limit is on your ESC? I would go with a Epic motor if i were you.