I am very happy with the Markham that I have. It has stood up to a lot of abuse, using one tooth to break roots and dig up small trees, and other torture. I also use it as a "hook" on big (1", 1 1/2") vines. I use one tooth to catch the vine and then start backing up. There have been many vines that caused the tractor to spin the loaded tires or stall out but the toothbar held up to the punishment. I would buy another Marcham in an instant.
Don't know anything about the WR Long.
Bill Tolle