That's really up to personal choice. I like the Sabertooth better myself, but that's just because I like the way it looks.
If you need a board with onboard WiFi and PCI slots, go with the P8Z77-V, otherwise the Sabertooth is basically the same besides the number of USB ports and headers.
Comparison between them to help you out. http://www.newegg.com/Product/Productcompare.aspx?Submit=ENE&N=100007627&IsNodeId=1&CompareItemList=280|13-131-820