Actually, the doctrine of Eucharist is probably even more refined in the Orthodox tradition. Catholics came up with the doctrine of Transubstantiation about the time of the Reformation (Aquina, et al), but it is a religious doctrine that only makes sense when prodded with a specific theological question.

I've always found the Orthodox teaching to be a bit more appealing. With Catholics, the Eucharist is the embodiment of Christ - you partake of the body and blood. With the Orthodox, it's consider more along the lines of communion with Christ at the last supper - it's not so much of Christ coming to you - as you coming to Christ in Communion.

But like I said, theology is a study in closed systems.