From looking at the NEC webpage, it appears that the MSRP for the PA302W is $2400 without SpectraView and $2650 with.
http://www.necdisplay.com/p/PA302W-BK
Additionally, it looks like they changed the port layout from the PA301W. A 301 had 2xDVI-I Dual Link (capable of both DVI-D digital and DVI-A analog input) and 2xDisplayPort 1.1. The reason for the 2x on each was so that you could hook up each of two computers to either pairing. And because of course HDMI can be converted to DVI, you could also input HDMI (and HDCP is also supported). The new monitor forgoes the 2x strategy and instead gives each of 4 different input types: DisplayPort, Mini DisplayPort, HDMI, and DVI-D Dual Link. I can't say that I am entirely a fan of the new layout, especially the inclusion of Mini DisplayPort when the box already includes a Mini DP to DP cable. I understand why including an HDMI port was a good idea--it makes it easier to hook up for monitoring an HDMI feed--though personally I could care less.
In other news, the power consumption dropped precipitously (155W for PA301W, 87W for PA302W). Running two PA301Ws is like having a small space heater going.
The Adobe RGB coverage remains largely the same (98.2% for the PA301W, 99.3% for the PA302W). My personal PA301Ws have consistently been able to achieve 99.5% of Adobe RGB so potentially no gain there for me.