sadams04 :
This really isn't the right forum for phone questions, but until your thread gets bounced...
They both sport a Snapdragon 800 series processor (which comes with a very nice Adreno GPU), 2k displays, and high resolutions cameras. The major differences here are going to be personal preference... Put your hands on both and choose the one you like. IMHO you really can't go wrong with either. ...especially after LG redesigned their overlay for more of a minimalist approach (Nexus like).
We won't delete it, it will just get moved to the appropriate forum. The Systems forum isn't really appropriate for cell phone posts, and the cell phone board we had got deleted when the Tom's Guide forum opened.
That said I'd go for the Nexus 6 or Samsung Galaxy Note 4 over the LG G3.