I have not been able to find an official checklist yet of which baseball cards have this feature but you can bet there are a bunch listed on ebay. Based on the photos I have seen the variation is subtle, yet when compared to the 'normal' version of the card it's pretty clear. The tricky thing is there are a number of cards with green backgrounds that do not appear to have this green tint.
Of course, it looks like there are a number of these 'normal' cards with the green background listed on ebay as green tint variations (just go to ebay and do a search on 2011 Topps Heritage Green Tint). I just wanted to throw this out there in case someone is planning on purchasing these variations on ebay. My advice is to stick to the auctions where they show the normal card and the green tint card side by side. Alternatively, do a search on Google to see if you can find confirmation of which cards have the green tint variation. If anyone finds an official list please let me know and I will post it here.