I have both, as well as earlier Steyr Model M in walnut, Professional in Cycolac, an SSG 69, and the earlier Mannlicher actions (1903 action ).
The early SBS had a grey plastic stock which had a bit of flex to it. The forend is long, and the barrel mostly floating. They shoot superbly from the hands or a bag up under the magazine, but a bipod way out front, with a little twist put on it, could touch the barrel and affect accuracy.
Steyr made the stock a bit stiffer, and changed the color to charcoal. ( also some camo stocks ). I don't use bipods, so no problem for me. My 7x64 and .308 Win will shoot sub MOA out of my hands - good enough for hunting ( and 1/2 MOA off a bag with top ammo). And they are not picky about ammunition. None of my Steyr Mannlichers ever have been. And they will shoot all weights to the same small groups in the same spot. The only difference is vertically, as the range extends or there is variation in velocity ( like a mild 165-gr at 2,700 fps vs a hot one at 2,900 fps from my .30-06).
They are not the lightest weight in full trim with a 24-inch barrel, because the action is so stout, and the stock is dense, not flimsy or hollow. They are very strong, proofed at 90,000 PSI. They come with very good iron sights. You can change the length of pull by removing / adding the spacers, and change the buttpad from hard to firm, to Limbsaver soft, in a minute, just prying them off ( no screws ).