Greater space capacity - While the PC version had to fit on two CDs, the PS2 version had a DVD at its disposal, allowing the voice samples and FMV cutscenes, which were heavily compressed in the PC version, to breathe a little more.More intuitive controls - Although the Monkey Island series has always been indigenous to the PC, the direct control scheme of EMI made it a natural fit for a console gamepad.Here's an overview of all the characteristics (that I'm aware of) that distinguish the PS2 version of EMI from the PC version. To put it frankly, the PS2 version of EMI is an odd duck, and there are some noteworthy things about it you might not be aware of.
The reason why I feel the PS2 port of Escape from Monkey Island is an exception to this helping of common sense, however, is because there are actually some pretty unique features, tradeoffs, and additions/omissions between it and the original PC release of the game.
In general, discussing the differences between various versions of the same game makes for a dry read at best, and under normal circumstances could hardly generate enough interest to warrant an entire page worth of material.