Jim,
I understand. But I highly doubt you can actually learn anything by testing one roll of each. I am of the opinion that it takes dozens of rolls with one film before you start to learn the inns and outs in all kinds of lighting situations.
But since you have the film you might as well use it. I'm glad that you will settle for one film after your test. Between the three, I maintain that you will get excellent results with either, so it doesn't really matter which you choose.
And, you don't need a darkroom just to process film. You need a changing bag, a tank, some reels, beakers, storage containers, a thermometer, a timer, and a sink (I process film in the laundry room).
- Thomas