First, don't house snakes together. There are plenty of posts on why this is not a good idea.
Second, all Corn Snakes are Rat Snakes. Most of the Rat Snakes found in North America are of the genus Pantherophis. Black, Yellow, Texas, Everglades and Grays along with many others are also members of that genus. Another common name for the Corn Snake is the Red Rat Snake.
Corn Snakes grow to be between 3 and 5 feet in length. Other Rat Snakes such as Blacks, Grays, Yellows, Everglades and Texans can reach over 6 feet in length.
I keep 10 types of American Rat Snakes and I find them all very easy to handle. None of mine bite, but I do make it a point to handle them all often and gently so as not to scare them.
The tamest snake that I have in my collection is a Gray Rat, so forget about all the generalizations. Some are tamer then others, but I have yet to see a captive breed American Rat Snake that did not become fairly tame with a little work.
As far as crossing a Corn with a Yellow or a Gray, it can be done, but why do it? Few people want such hybrids.
