Wouldn't recommend that style at all. That one you have to unscrew, put the bearing in, screw it together, start pumping grease. The original one posted you just set the bearing down and push down on the top plastic piece, job done.
The only "modern" Williams tool I have is a 24" adjustable wrench. Won't do that again, the one I have from harbor fright is just as good and far more affordable.
I have the top one. It's very lightly built, wasn't drilled properly so it was a pain in the *** to put together, and did I mention lightly built?
Oh but I've had it for a couple of years and it's held up surprisingly well. I never move it and it just does it's thing, not like it's doing...
I always heard the story that they all came down the same line and were tested upon completion. The highest performers got the priciest brand name and so on. No idea if it's true or not.