I got the both of them. For me the Collie is a lot of useful and stable, although it takes a little to know (the same for the Terrier) which software version is appropiated in every case, and how to set up some things. But, for it we have this forum.
C-3200 is faster and more capable depending on your needs. I bought first the C-3200, I've installed Open BSD, Debian, X/QT... a lot of power.
Now I'm using the Collie daily, and I'll try to set up properly X/QT and Debian. There's a way for everything. In this way my C-3200 is less exposed to the everyday's use risks. And the Collie, although a little slower ( for common applications, sure more with Debian or X/QT), is wonderful and very noble. I like very much this aged machine.