In looking at the website, the holster bodies appear to be identical. However, the International includes the belt loops and drop/offset for the same price. On the other hand, the paddle component appears to be a bit more robust on the "Paddle" vs the "International".

Has anyone tried both for comparison?

I have the International and use it with the paddle attachment for IDPA. The main difference that is apparent to me between it and the Paddle is that the latter is a more "traditional" paddle holster design where the paddle portion actually sits inside your waistband. The International's paddle feature is designed to go behind the belt only so that it sits between the waistband of your pants and belt. It seems to be plenty sturdy and with a proper belt there should be no chance of you having an embarrassing moment drawing your gun and holster together simultaneously.