As the title states, between the 2, which one would you get?
I've always been tempted by the 36mm Exp I and the 36mm Railmaster and now I have the opportunity to purchase both, but I can only get one.

The Railmaster is much rarer, but its also expensive now, thanks to its rarity and aesthetically, it looks quite similar to the AT.
The Exp I is a well known classic, and I adore the tritium dialed 14270s.