Last I checked, several years ago, the Galaxy was NOT vegan. It contained some lactose-related things.
The Daiya product doesn’t really get the texture, no, but it has decent (to me, not great) taste. As far as “premium” pricing, why not do the Vegan on a gluten-free crust only? That way, you’re selling an organic product to start with (well, most g-f crusts are organic, maybe some aren’t?) and don’t have to worry about an upcharge. But, heck, even on a normal crust, it’s no big deal in most POSs to make a special price.
There is so much fear in this industry, fear of trying something new that the “big 3” either don’t do, or do so much cheaper. Going gluten-free is not a choice for anyone, it’s a necessity. Vegan is, usually, a choice. But, the one similarity is, those populations WILL pay for a product that is quality.