An image it will be amazing, but something like you just do with compare function is great.
For tournament competition often players send one image with all the decks, so you’ve just the same thing through compare simply removing the highlight for the differences.
sorry for my english 😉

Really, an amazing work! I LOVE this site!
The compare function is great! Do you think to add a merge function to join 4-5 deck in the same view? it will be useful for social. You should add hearthstonetopdeck TAG at the bottom for ads.