So Sennheiser just updated their HD 4.50BTNC’s with their new HD 450BT’s which do have some key upgrades over their predecessors. Now naturally people are asking how do the HD 450BT’s compare to the Sony WH-CH700N. Now Sony is going to be releasing their new WH-CH710N in a couple of months with what seems like a major redesign which personally has me very excited. Now I’m predicting that the WH-CH710N will release in April… But in the mean time lets see how these two headphones stack up against one another.