I store a lot of my stamps on Vario stock sheets. And I put all my FDC's on 3-pocket Vario stock sheets in binders because it save me mounting them, and they can be heavy. Beyond that, actual stamp collections on Vario stock sheets (oh, okay, I'll call them "pages" if you insist!) seem a bit lazy to me, as if the collector has too much stuff and too little time to deal with it. So they just slip it all into pockets and are done with it.
A collector who wanted to showcase his stamps would more than likely want to mount them on pages, as they have been for generations. It's the "extra" stuff that often gets shoved into Vario pages because it's just much easier that way, and they do look pretty decent on those nice Vario pages.
I use Vario pages, and I have nothing against them, but they were designed for storing stamps like stock books. To me, they still look like stock books, not like albums. And I do realize some collectors use stock books as albums. I prefer actual "pages" with stamps mounted on them, as much as possible, excepting covers and other items that just won't fit well on pages.
Why not mount them on heavy paper pages? There are many ways to do that -- heavy duty hinges, double-sided archival tape, photo corners, stamp mounts. All will work, and the result is going to be look "album-like" and satisfying. To
me, anyway!
But it's entirely up to you since it's your collection.
