Happy to help. Here's a bonus picture of a small assortment of whittlers.
Two Dog Man, I realize you already got the information you wanted, that is, how to identify a whittler, but as long as I am on a roll I may as well apply what I was saying to Yablanowitz's fine set of knives. They are all beauties and I'd be proud to carry any of them, but I would not necessarily want to use them all for whittling. Here are my reasons:
Top left, the Case Seahorse: I had one and gave it away. It was comfortable to use and the two small blades are a great combination and perfect for whittling, but the main blade is quite thick at the spine. Some folks like that, but it was the reason I got rid of the knife.
Top right: Potentially a good candidate. The main blade looks to be ground relatively thin and I like the coping/pen blade combination for the secondary blades. The handle looks big enough and the edges look to be a bit rounded.
Second row: Both knives are on the small end of what I prefer to use (I'm assuming they are 3.5" closed), but are big enough. The handles on that pattern are comfortable. I would not buy them for whittling because the cutting edges on both secondary blades are essentially the same.
Bottom left: Same comments as for the knives on the second row.
Bottom right: Looks like it meets all my criteria. Main blade looks to be full flat ground, which I forgot to mention is my preference. Mostly I prefer to avoid a saber grind. The secondary blades are a great combination - the pen with the slightly curved cutting edge and the wharncliffe with the straight cutting edge. You can tell the edges of the handle are rounded and the size is big enough that it would fit my hand just fine (I'm assuming it is around 3.5" closed)
A couple of comments on blade selection: If you are going to be doing spoons or anything else with a dished surface, a nice spey blade with a nice, big, rounded tip can be pretty handy. That's assuming you are going to use a pocketknive to do all the whittling. The pen blade is my most commonly used blade. The main blade gets used when I am looking to take off a lot of wasted wood, but doesn't get used much once the pattern is roughed out. I use the coping or wharncliffe the most when I am marking a straight line, then cutting to it from one direction. You can make those cuts with a pen blade, but the straight edge coming to a sharp point makes it a lot easier.
That is what has worked out for me, but I know other folks have different preferences and I respect their opinions.