Depends.
What motor, class and scale you running?
There is a reason why there is a premium attached to more expensive kit. Ultimately more features, for example if using boost and timing, you can alter how the esc delivers the power and really go to the nth degree to profile it just right for you.
But... If you run a limited class and dont run boost, turbo etc then it offers very little over what you have.
Some classes dont allow boost and require blinky modes on boosted speedos.
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Because obviously you want to know what i'm running!! 
Xray, Zen
Maclan, Surpass, SRT, Futaba
MUST GO FASTER!!
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