I just got in a High Cut Viper A1, and the design has changed slightly. The cutout is slightly smaller, and now incorporates some of the flare found on full/mid cut helmets. Hard to see in the pic but the bottom edge along the sides now flares outward and is slightly wider.
Seems to be an improvement IMO with regards to protection and design, however, you are no longer able to clip the SF helmet lights directly to the helmet without modification. Unfortunately for me, due to work constraints, this means I had to send it back to switch out with a Rabintex model that still uses the older profile. Also, if anyone's ordering one, make sure your helmet cover will work with the new profile.
The change is not reflected in the TNVC product page image yet. It is, however, shown in the Revision page. I called and TNVC took care of me as usual. Thanks guys!
On a higher note, my amber filter was delivered with this helmet, making my TNV/PVS-14 that much more awesome.