I have an Archer C7 AC1750.  The sticker on the back says "ver 5.6".  The Web admin console shows "Hardware Version: Archer C7 v5.0".  Does anyone know why the difference?  I want to buy a 2nd one to have as a backup(I really like this particular model), and want to get it as identical as possible.  I've seen them on eBay with a sticker on the back that says "ver 5.0".  Ideally, I'd like to be able to save a backup from the existing one and be able to restore it to the other one as-needed.  I realize I'm picking nits here, but if my internet goes down, and my ISP is pointing the finger at my router, I'd like to be able to have an identical replacement on-hand for troubleshooting, without fitzing around with different configuration items, trying to produce an apple-to-apples comparison.