Answer: It is impossible to compare them. First the corporeal joy is temporary and not eternal, it is limited by the vessel of the desire. It is so tiny that it is as if you were locked in prison in solitary confinement and you rejoice at a piece of bread and some water that you are given.
It is impossible to compare the pleasures of this world with those of the spiritual world because they are fulfilled in different vessels. The most real and candid joy in this world is the joy of a baby who clings to its mother, feeling her warmth and receiving physical and emotional pleasure from her. In her arms, he feels that he is in heaven, breathing her scent, suckling her milk, totally adhered to the upper.
There is not a better feeling than this in our world. Otherwise a baby would not be able to grow. But it is impossible to compare this pleasure with spiritual pleasure. Our world is fictitious and temporary. We can only compare concepts that are linked in some way, that have a common formula, as in mathematics or physics.
There must be some link between them, so that it can be checked and measured in comparison to the standard. Here, however, there is nothing we can measure.
From the 1st part of the Daily Kabbalah Lesson 5/20/14, Writings of Rabash