I have one of each. Love to shoot the combo at local matches (wouldn't do it at a long weekend though, too much steel to carry for 2 days!)
The Walker is a heavy unweildy behemoth of a pistol. Me thinks there is a reason they only made 1100 of them and redesigned them into the Dragoon a year later. The balance on them is terrible, and as stated previously the loading arm has a tendancy to drop on heavier loads. I was able to dremel a slight ledge on the catch and this pretty much took care of that problem.
The Dragoon is much better balanced, has a locking loading lever and is considerably shorter. It is still one hellava big revolver though. If I could only have one, I'd get the Dragoon. But I got em both and love each one in its own way.
Besides, if a Walker was good enough for Gus and Josie, it's good enough for me!