There has been some discussion on a few threads as to what a good comparison of STOL would be. After a little looking I found this chart that allows for a semi reasonable comparison. It is from a report written by Richard D. Hiscocks, of de Havilland fame. It has tons of great information on all of the DH Canada line of machines and their work on flap development and stability. Some on the Beaver and Otter, as well as their other stuff.
You just have to figure out what your airplanes pertinent numbers are and plot it on there. If you are interested in more reading on the subject, you can find a copy of the report. It is very concisely titled, "A Case Study of the de Havilland Family of Commuter Aircraft". I'm sure it was on the NYT best seller list at some point.
Sorry about not no explaination....
W = weight
b^2 = span of plane squared
Weight divided by b^2 gives the wing loading, and I think there was some discussion about that as well in some other threads.
The T/W is the thrust to weight ratio. That is a little more difficult for your average pilot to figure out, but you can probably replace it with P/W or power loading and generate a similar chart. T/W values are really there to show trends anyway and not required to put your airplane on the chart.