You can't use generic model listings to figure out what bands a VZ phone has. And you can't use non-VZ phones on VZ. So it's really simple.
Anything before the S4 doesn't have AWS (so avoid). The S4, X, and G2 (again, VZ-specific models only, you literally can't activate non-VZ devices) got AWS via baseband firmware update. Every LTE phone after those definitely already has AWS.
edit - IOW, recent VZ phones are great for taking to other carriers, because they're all SIM-unlocked and have a pile of HSPA bands and AWS LTE (also used by T-Mo and AT&T). But you absolutely can't go the other way and take another carrier's phone onto Verizon.