Yeah, they bring nothing to the table other than a quad core gaming beast with a 720p HD screen and stock Android, regarded by the review community to be the best 7 inch tablet at ANY price. Yep, nothing. The Samsung Galaxy 7+ is a significantly worse device in every single aspect aside from it's SD slot and the N7 has USB OTG. I can't image why you would suggest such an inferior device as a "Nexus Killer" unless you work for Samsung, or bought a SG7+ and are trying to justify your purchase.
I'm well aware of the specs. They're not close at all.
Sent from my Nexus 7 using Android Central Forums
Well it's a terrible multi-media device due to the lack of CODECs Samsung has on their devices (yay for relying on redundant 3rd party apps to do what other devices can do with stock apps, something I absolutely deplore), in addition to the lack of DRM support. It has poor Social Network integration compared to TouchWiz devices. Google has no standard Sync application, so media management is through MTP (Lol, especially if you own a Mac) and PIM management from a desktop is basically non-existent. Some of Samsung's modified apps are superior to their stock equivalents (No device backup/restore, etc. that matters to some people and can be a lifesaver at times). Samsung puts things like Music Recognition in the music app, for example, negating the need for third party apps like Shazam.
There are lots of areas where stock Android is seriously lacking from a user experience standpoint (Google improved the UI tremendously, but many other shortcomings have gone untouched). That's why most people still buy TW/Sense/Motorola devices in lieu of Nexus devices even when they're on carriers on contract - even after the price drops.
Not everyone buys a tablet for gaming, and not everyone will spend $199-249 for a 7" tablet to game on when something like a handheld gaming console (PS, Nintendo) or even a real console (XB360, PS3, Wii) which is way superior.
No back camera on the Nexus 7, either, in addition to the lack of an SD Card Slot, making some applications useless on them, while completely usable on the GT7"+ (i.e. mobile video analysis apps like Coach's Eye).
The screen resolution difference isn't a big deal, the Exynos performs well enough (and performance helped by the fact that it has to push less pixels), and the AMOLED screen has almost unlimited viewing Angles in addition to being incredibly power efficient if you know what you're doing, so for an enthusiast with a clue the GT7"+ will undoubtedly outlast the Nexus 7's battery, easily.
I've used a BB Playbook (7" with same resolution) and the difference between that and 720p on a 7" tablet isn't really a factor, IMO.