Recumbent bikes are generally as comfortable as trikes. The seats and body positions of mine are all very comfortable. Advantage of a trike is that you can immediately ride it without the learning curve that comes with trying a bike unlike any you've ridden before; a trike won't fall over. That learning curve is variable. I was able to ride around the block when I test-rode my first (used) 'bent with only a couple of false starts. Anyone who has learned to balance a bike or motorcycle should be able to successfully ride a recumbent bike.
Visiting a dealer with a variety of recumbents is the way to go.