Time for more cat pandering

In response to popular demand (i.e., a recent conversation), I’ve decided that it’s time for more cat pix. So here goes, with quiz question:

I wonder if one can tell just from these two pictures who is the calmer, and who the crazier, of these two brothers (whom I would presume are genetically just half-siblings). Whether or not the pictures give it away, it’s not a close call.

Here’s Gary:

And here’s Sylvester:

So, whaddaya think?