NZXT Kraken x60 vs x61

[Jkasch727]

What is the difference between the two? I can get an x60 refurbished on Newegg for 90 and would like to know if it is worth spending the extra money on the x61.
CPU: i5 4690k, would like to overclock but can't considering I'm still using the stock cooler.

 

[ThePurpleJay]

The Kraken X61 is better at cooling, especially with the newer manufacturing. (Air cooles like the Cryorig H7 and the Noctua NH-D14 also do a great job of cooling)