VRM shielding does not really matter,
DIGI+ is a hybrid Digital/analog power delivery.
-gives a mobo a bit more flexibility and stability for extreme overclocking.
-cost less than a equivalent analog VRM
-sounds good for marketing!
-saves a bit of energy in real world test
-is useless for average user!
For your needs, you are agonizing over details that I almost never even consider.
LAN controller matters
Audio codec may matter
Color may matter
Overall board/part quality may matter
Arrangement of PCI-e slots may matter if you plan to add a PCI-e WiFi card
They are both decent boards (neither of which I use) ASUS should be a little more robust, and Gigabyte should be a little bit better featured. The difference in robustness...