Stick with SX2 or get SX3?

[Cardnim]

Hi guys,

As some of you may know Ive had an SX2 for about a year now.
I absolutely love it, but I dont think it loves me.
I only started racing after I got it, so dont have much experience; and Im not very good with it.

On occasion I am alright (when i get my head in gear) but other racers at my club say I am a very aggressive racer (whatever that means!) and that I need to calm down and become smooth before I will start being competitive.

But the SX2 (I think Im right in saying) is known for being twitchy; whereas I've heard the SX3 is a calmer drive str8 out of the box.

So, I have just had a friend offer me his (fairly) new SX3 for a price I believe to be very fair.

Question to you guys is - should I buy the SX3 or not?
Would the SX3 help me in my quest for "inner driving calm"?

(It would mean also changing my batteries (from stick to saddle) and as cost is a consideration here, that has to factor in)