Replying to How much do Ski boots change from year to year? Krypton Cross 2010 vs 2012

I just accidentally bought two of the same boot on eBay. I won bids on both brand new in box 2010 Dalbello Krypton cross boots, and slightly used 2012 Krypton Crosses. The used pair looks almost brand new, They couldn't have been used more than 3-4 days.

Which pair should I keep? the brand new older model, or the newer slightly used model? would the newer one be lighter, have new technology in the liner, or have any advantages at all?

Both boots cost me the same, and both sellers accept returns for any reason.