what relational operator is comparing without class method overloading

Hello,

I was looking the example code for "Introduction to Object-Oriented Programming in MATLAB® Webinar": http://www.mathworks.com/matlabcentral/fileexchange/23616

In scenario "5 - Inheritance", I found I can compare like, balloon{1} > balloon{2}; ans=0 or balloon{2} > balloon{3}; ans = 1, without overloading the conditional operators. Arithmetic operatros will give errors without overloading which makes sense.

My question is what MATLAB is comparing for those objects, their cell array index? or inhreitance order? or some property value?

So far the retunred result is confusing. For example, balloon{1} and balloon{2} are the target class, balloon{3} is a subclass of target, if I add a balloon{5} which is also target class as balloon{1} and balloon{2}, it shows balloon{5} > balloon{2}; ans = 0, and balloon{5} > balloon{4}; ans = 1.

I knwo metaclass instance can use greater than or less than to figure out subclass relationship. But what are they doing in above situations?

Thanks