LG to me is garbage... Their hardware has never impressed me and I have seen a lot of broken LG products.
Now giving them the benefit of the doubt that Google is standing by a Nexus device that means that it should be solid hardware. (should be)
Asus on the other had has always been top of the line hardware. In building computers if you want quality parts that you don't have to RMA
you just get the right working parts time after time then Asus has always been the way to go. They have also proved themselves in the
Android market with tablets. Google recognized this by giving them the Nexus 7 to produce and they did a great job on this.
Asus also has a history of unlocking their tablets, their UI is close to stock, and you will always find support for ROMs if there is demand for the device.
Now if you consider the phones they are almost the same phone in the specs and both of their batteries are not removable.
But on a good not the ASUS Pad has a 5000 mAh battery to backup the phones battery. Other than that they pretty much are
the same as the GS3, LG Optimus G, and HTC One X+.
As far as availability in the US we know that both will be available as GSM which means you can use it on AT&T and T-Mobile.
If you are looking for it on VZW or Sprint then you are in for modification to hardware for the CDMA. The the only good thing
about Sprint is they will bend over backwards to get a high profile phone, so any nexus is almost guaranteed to be on Sprint.
VZW is going to want to lock the Nexus down again and Google might have an issue with it this time that will still be up in the
air and until they announce it I wouldn't be willing to bet money either way. As far as ASUS Sprint and VZW will probably not
get this phone.
Normally if you want a Nexus it because its unlocked. If that is the case and you are not on VZW then either one is a good option.
If you are on VZW then Nexus is the only one that will be unlockable. The other option is to go with a Dev or unlocked phone and
the only two out there for VZW, Nexus and SG3 Dev.
In the end it is not a question as to which phone to get and wait for as to what phone you can use. Depending on where you are
in the world and what networks are available to you determines what phone is right for you. You just have to remember almost any
phone will be able to be rooted in the end and you don't have to load a new ROM on it to unlock all the things you think you want.
There are ways to do it without loading a new ROM.