Key differences between DualShock 4 v1 and v2

I've searched Internet for about 15 minutes, but I must be doing something wrong, because I can't find precise information on what are the differences between DualShock 4 version 1 and version 2?

I see a lot of offers in my country for purchasing Playstation 4 with two controllers in a package and when browsing offers details it turns out that only one controller is version 2 and second one is version 1. As a complete PS-newbie I was thinking, if this isn't some kind of scam?

This reddit post contains a few differences. The ones standing out the most are:

Longer battery life, more durable rubber on the analog sticks, theres a light bar on the face of the touch pad, and the controller is also a little lighter. The biggest issue with the V1 is that the rubber on the analog would wear around the edges and then eventually peal off.

These claims are also supported by wikipedia

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