This is a very odd question for you to ask since you already know the answer according to your other posts where you explain that dot com is best etc. Obviously this post serves some other purpose that isn't yet clear.
However I'll bite.
As of this moment there are 137,218,106 .com domains registered (according to the zone file at tldzonefile.com)
According to wikipedia there are less than 8,000 edu domains registered.
Anyone can register a .com
.edu can only be registered by education institutions
.com is in global use in every country for any type of website
.edu is not (being that there are so few and with registration restrictions)
.com regularly has 4 and 5 figure sales in a thriving aftermarket
.edu has none