I have them both ways and haven't used the splitter with the wedge on the cyl since getting the splitter with the wedge on the beam, not even one time!
I never have to chase any splits, even with a big round it splits and falls to the side, staying on the table ready to be pulled back and split again.
BUT, I have a really good 4-way wedge, and what ever needs to be re-split stays on top of the wings, so I can flip it over and off the wing back right back onto the beam and away it goes, right through the 4 way again!
The wedge on the beam is just so much faster with regular sized wood and works great with the big rounds...
SR