Funnily I had an Allround Evolution that never got as much as a scratch, but I've chipped off a few parts of my Stratus Power Wood already in a month or so. Both sealed, but I suspect the job was pretty light on the SPW; I didn't do it myself. It should be a similar composition outer ply of the same species, but clearly the wood is different. EDIT: Or the glue used, amount used, clamping load used to assemble etc. is different. Who knows.
I think it was Carl who suggested I seal it because it's a Stiga, lol.
Cool, I guess it depends on the person. A lot of people seem to rather prefer having consistency of a brand new product, of course those kind of people are fussy about mass and thickness and so on. I suppose if you've sweat-soaked a blade for a decade, it's probably consistent in its own way, and it will have softer playing characteristics if measurements of old vs new blades are to be believed. If you're under the liberty to reveal, who are those players?
Some people have made measurements of blades before and after sealing and the basic properties didn't change. I'm willing to believe that maybe there's some huge blindspot that is missing, but nothing comes to mind. If the bending, torsion and conical flex is the same exactly, it's the same, isn't it. The sealant is mostly there to change how the glue interacts with the surface AFAIK.