New 2wd: TRF201 v Cougar SV

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I'm looking to get a 2wd and have narrowed it down to the 2 new kids on the block, the 201 and the Cougar.

What are the recommendations?

I don't want to have to spend loads on extra bits, so which is better out of the box? And which is gonna need more spares (I have noticed a few threads about idler gears on both cars).

Also, what are the differences between the S1 and Pro versions of the Cougar?