Tux and OS X

Some say the world should be Tux,
Some said of Big Cat OS X;
"what the heck", I said, "both're of Unix stock,"
Thus, I first favored Tux;
Years pass, Tux desktop disappoint,
Though without doubt, great on a server can,
Now that I know enough of OS X to pen:
'tis got great (Core) Foundation plan,
Big Cat is the desktop on my 802.11 LAN!

*images are from here: Linux (left character) and Leopard (right character)