LS and VS (Sprint and Verizon) models are CDMA are usually aren't supported in the G2 since there are issues plaguing it like battery drain and no carrier signals. If your going to get one. Get an D801 (T-Mobile), D800 (AT&T), or D802 (International). It depends which service you use.
You can find out which is best with your carrier at
http://www.willmyphonework.net/
As for CM13, you can download the latest versions at
https://download.cyanogenmod.org/
It's same as CM13 for the L70. I think some different bugs but it's the same thing. Currently running it with a D800.
If you do buy a G2. PM me and I can help you get setup with this device. As it's a little more tough as per say the L70. Where you just root and rom and your good.