To answer the question of how the Walker amp stands compare to the Mapleshade, although I'm a dealer for both, I have yet to compare the two versions. I look forward to doing so. However, I can say how they differ technically.
Pierre makes a point of using one single piece of unlaminated air dried, spray laquered maple. Lloyd does exactly the opposite. He uses kiln dried maple, laminated with alternating grain density and direction, and uses a multi layered hand rubbed penetrating oil finish. Lloyd also offers them in a harder, more expensive and supposedly better sounding Jatoba wood. Each of them believes in their own particualr approach. I guarantee that the two approaches yield different results. Lloyd's approach is undoubtedly more expensive to impliment and consequently commands a higher price. It is typical of Pierre to attempt to cut to the chase at an affordable price and typical of Lloyd to go for the throat at any cost. Which you prefer in your system is, of course, the question, as well as what you are willing to pay.
Two inaudible pragmatic issues are that the unlaminated Mapleshade version does tend to warp slightly and the finish can be scratched. The Walker Audio version will not warp, the oil finish will not chip and any scratch can be easily made invisible with a simple touch up with any oil.
Both companies also make excellent racks which differ similarly.
