I'd say that if you already have a DEX410 then a quick upgrade with the 2mm stuff would suffice.
If you don't have a durango and are on a budget, then the R is well worth getting.
But after only one meeting its dificult to tell if the R is better or not.
Its the National at southport next weekend so I'll be able to give a better view of it performance of astroturf/mixed surface.