So I have 2013 Sektor RL which do have MoCO I was just wondering if it is worth upgrading to the Rev RLT MoCo DNA Damper?

Upgrade the rebound to dual-flow before doing anything else. Changes to the compression damper make nowhere near as much difference to performance (although I personally have an RLT damper in mine too).

So would that be be the 2010-2013 or 2014 rebound damper?

It’s existed for ages as Blackbox rebound damper or called dual-flow. The one I fitted in my 2012 Sektor was the 2010-13 model. Depending on whether your fork is coiul or air, you might need to move the negative spring onto the new damper rod (if you have coil).

Anyone tried both 2014 and old Revs notice any difference in rebound? Apparently 2014 has rapid response.