I think in the long run, Zekrom > Magnezone Prime. For one thing, the Zekrom you pulled was a Secret Rare, which you can probably pull 2 out of a box. You just traded a possible BDIF post-rotation card away. I am horrified.
:'(
Anyway, there's actually 3 versions of Zekrom & Reshiram. The Tin Promos, the Set Versions (they are normally numbered), and the Secret Rare version. My bad. DX
I sense this thread's closure soon.