Frankly, I disagree with your notion that fiberglass holds more detail?! Were does that load of BS come from anyway? The rhino head is fully polystone, so where does it lack detail as opposed to the body? Simply does not make any sense to state otherwise.
If you want to see great POLYSTONE skin detail, check out the Uruk-Hai Berserker PF, which holds a multitude of creases, muscle, christ even skin pores! Or consider Venom, Carnage, or any of the dinosauria line sculpts for detail(s)....etc
Bottom line is that SS made it's name using polystone for it's superior qualities, feel, & heft, & I've never heard of any true collector complain regarding polystone quality. ever!. The ONLY reason they (SS) tried to change this beloved, high quality formula is simply to increase profits by using cheaper fiberglass. Hence we would keep paying more (with their ridiculous price hikes) for cheaper product. Now what is so unbelievably hard to understand about that?
And yes, I own the Rhino, love the sculpt, size, pose, but can't stand the Sideshow rip-off, cheap, fiberglass body. Hoping they never try this kind of BS again.
P.S. And yes, I'm reluctantly going to keep Rhino. Why? Because he is a classic spidey villian that is a must addition for the best !/4 scale spidey series out there. And I don't foresee them making another anytime soon.
P.P.S. So to all the Bodies out there, keep raising hell. Lest the fat heads at Sideshow forget.