I'd go for the Superleaf: first, it's discontinued. Once it's off the market entirely, you're likely going to pay dearly to try one down the road. Not only is the Military not going anywhere, but it's bound to improve in later iterations.
Second, the compression lock is fantastic and I strongly prefer it to a liner lock. In fact, I'm holding my breath until Spyderco releases the Military with a compression lock, which, if you ask me, is only a matter of time. I'm guessing that when they do, they'll also tap the knife for a 4-way positionable pocket clip, which would give me my preferred tip-up carry.
Third, the price! The Superleaf is going cheap, again, due to being discontinued, while the Military appears to be full price (unless you're going after a lefty model, in which case, jump on that one).