I would suggest if they were still using 34nm NAND flash,
while at the moment they have switched to 25nm and I can see many reports of drop in performance and reduction of lifetime of the same model,
I am not sure for the current situation.
I remember that OCZ has a solution in dealing with the problem, by replacing the 64Gb based SSD
by 32Gb based,
"For those customers that have already purchased a 64Gbit part and wish to move to a 32 Gbit die based drive solution, OCZ will offer a program in which customers can trade in their drive and receive the more expensive 32 Gbit die‐based drives. OCZ will ship the replacement drive once the original drive is received. If you are interested in an exchange please contact an OCZ customer service representative and we will be happy to assist you."
maybe the current 25nm drives are faster then we can see in the benchmarks, you will need to search to confirm that.