Not sure if I am the right person to ask, but here's the info I can give you:
- Super Recycler is a 20054 model with a Briggs engine. I used it for a few years, but I didn't mulch many leaves with it (my yard doesn't get covered in leaves.) Right now it's sitting unused in a corner of my shed.
- Recycler #1 was given to me by a friend from church. It has a Tecumseh engine. Runs good but I haven't used it yet because the blade needs replacing and I don't have a new one.
- Recycler #2 was sitting out by the road, I picked it up and brought it home. Has a Briggs engine. It won't start, so needless to say I haven't used it.
I hate the Toro Personal Pace drive system, so I got a Honda instead. It cut horrible, so I put a G6 Gator blade on it and now it cuts and mulches better than any mower I've ever used.
Hopefully you can find someone who's used enough Toros to make a proper comparison.