I think these are all probably good brands. It's just the profile is different on all of them (even most of the "clones" I suspect). My guess is that people here would say that they prefer a profile over a brand. E.g. if Eclipse came out with a 100% guaranteed to match Gold Seal clone at 1/2 the cost of the original, I suspect people'd be willing to give them a go.
<<Emphasis added>> Under the conditions of your hypo, sure, a no brainer ... especially since Eclipse offers a 60-day money back satisfaction guarantee [and the added advantage of high-grade stainless-steel runners on some models]. However, the Eclipse Pinnacle (which is "comparable" to the Gold Seal) is
not guaranteed to be a 100% clone of the Gold Seal; nor, in fact, is it. In particular, they have substantially different spin rockers ... and the spin rocker is a key signature design feature of the Gold Seal. Paramount makes a big deal of making true copies of the MK and Wilson "profiles", by which they mean the spin rocker and main rocker and heel lift. But even the Paramount version of the Gold Seal is not a true clone of the Gold Seal. So, if you want
all the design details of the Gold Seal, you need to stick with Wilson. In which case, preference for a particular blade design
in its entirety effectively becomes preference for a particular brand.
More experienced (-->older) coaches grew up with Wilson and MK and naturally make recommendations based on their own personal experiences. Then their students need to decide whether there are personally compelling reasons to try out other brands; personally compelling reasons include, e.g., lower prices, better steel, lighter weight, pretty colors, what's the trendy fad with the other kids .... Several skate techs I trust push other brands because they've found better manufacturing consistency. Jackson and Riedell pre-mount their own brand blades on their lower-level kits, hoping you'll stick with their brand blades as you move on up.