The big pocket on that kit makes it the Metra. Metra uses a pocket that is almost as big as a single din. If you buy a Metra kit from Crutchfield they usually include a double din (two single din units) kit also.
The single din kit from Scoschc has a much smaller pocket, and has a nicer texture than the Metra. This does not show in Jpgs on the web.
You can usually get this cheap from Wal-Mart
I have used all three of the mounts.
Plus for the Metra is if you want to carry a LOT of junk in the pocket.
Plus for the Scoschc is it looks better installed, you can't see into the bottom of the smaller pocket.
On the big pocket units they make drawers that you can put in them. You see these on eBay sometimes. The drawer fits flush, and is about the size for a wallet or pocket gear.
While the smaller pocket or no pocket tends to look better in the 04 up trucks, I do admit that when I had the Metra big pocket in my truck I did use that pocket for various things, and sorta miss it now that I have a KVC-AWX706 filling the whole double din hole.

Scoschc and Metra single din units. Note the bigger pocket on the Metra.
On that JVC EXAD, I have not used that model, but I just installed a 706 in my truck and I found the sound is good and it is well optioned.
As a plus the SD chip feature works better than JVC says.
It's faster to load than an MP3 DVD and I am using a 1 gig SD but in the manual it recommends only a 512. I have read a review that states it will do a 4 gig SD. SD chips rule.
Chris