That's my best guess at the moment..
Verizon is getting a pre-Thanksgiving exclusive (60 days maybe?) Nexus that includes LTE on an OMAP4 SoC..
And then after that exclusive.. we see the GSM/world version on Exynos + dual core GPU..
That would kind of explain the two model numbers.. but who knows, really..
Either Panda or P3 tweeted yesterday that the i515 is VZW and the i9250 is Vodafone. This says to me that they haven't seen an i9250 but believe it exists. I HIGHLY doubt this will launch in its original form without a TI CPU. They made a big deal of that partnership and are not going to just retweak an entire OS for another architecture. 4430 likely. 4460 welcomed surprise. Exynos? Not happening at first launch and maybe not at all in US, contracts get signed.
Battery life? Who knows. It won't be great though, it's going to be thin and hot. Learn to only click LTE on when streaming; treat your brightness like you do now; etc.
This phone will be fantastic but everyone's expectations and fears of *the next best thing* are WAY out of whack. Most of us are coming from the OGD. If you don't think this is the phone to grab from that, you're fckng crazy. Aside from first ICS and OS updates you also have access to any [labs] stuff they're working on first if at all. This is the phone to get. Don't draw the gun if you aren't going to pull the trigger.
ALSO, I wouldn't trust anyone but Nickinson, Kellex, Panda, P3 and Flemming. You need to think of how communities, businesses, tech, and volume/materials work before agreeing with a list of stats.
PEACE< IM OUT
edit: Q4 VZW exclusive. Q1 or next carrier LTE launch it hits all 4.
edit 2: they're working on.