CoD Zombies- HD or not?

I'm looking at the call of duty zombies app for my ipad. I'm a big fan of nazi zombies and I own all the maps from black ops and W@W. Here's my issue. Both the HD and normal version are the same price. But the HD version only has 2 of the 4 maps. And the first map is really horrible. Does anybody own the standard version? Can you tell me if I'm correct here- I'm guessing it will look horrible blown up on the ipad, and the UI won't be optimized for it.