Are their any other  4' plastic worms that are equal to or better then the Berkley Lug Worm?

There are lots of other centipede style soft plastics out there.  Some ar more rounded, like the Lug worm others have more of a rectangular shape to the body.  .

 

I know Bass Pro has several different variations of this bait and so does Zoom.   Years ago, I bought some bags of centipedes from Walmart that had some manufacturer I hadn't heard of then or since. They worked ok.

Looks like you could take any stick worm, snip 3/4" off of each end and then yo'd have a lug worm.

Don't forget the original Charlie Brewer 4" Slider worm - they are a little skinnier but even those aren't the original "Do Nothing" worm.   I'm pretty certain that over the past few decades other different companies have made similar style worm, but I can't remember then all right now.   Now is the time for a real soft plastic historian to chime in.