Nexus 4 vs LG Optimus g

I think it comes down to which carrier you're going to use. Nexus 4 doesn't work on Sprint, So that leaves most likely AT&T or possibly T-Mobile. If you're going to use T-Mobile, get the Nexus 4 because it supports their HSPA+42 and LTE. If AT&T, it's a tougher choice and comes down to which of your points you value more. LTE & Camera, or fast updates and developer community.

 

Moved for better flow of info

 

Judging by the response, I take it you're not in the US. Therefore most of my argument is not helpful since you're probably looking at international models.

I don't believe the development community is as large for the Optimus as it will be for top tier Samsung or Nexus phones. Updates from the OEM are vary from phone to phone, but the Nexus you can guarantee will be updated on time by Google. If you're interested in a developer community, the HTC One, Galaxy S4(I9505), and Nexus 4 have some of the largest ones around.

 

I'm a little biased because I have the Nexus 4 and love it. For me personally, the fast updates and large developer community are huge. I also tend to dislike oem skins and prefer stock android and I like it to be stable, which is why I stick to the Nexus line of devices.