Bike sizing question - are these two sizes actually that different?
You'll get 40mm more stand-over clearance with the 52 over the 56.

As the reach is about the same on both sizes you will not be cramped by the frame, but I suspect the 52 may come with a shorter stem. You may need to buy a longer stem with a little more rise to get the effective (to the handlebar) stack and reach that you need.