Without a doubt, stick with the SSG 69. It is an outstanding all-around hunting/sniper/target rifle. Steyr designed the SBS around the "economic" minded individual, and although it bears the Steyr name, very few professionals would validate it's ability to keep up with it's predecessor. The best analogy I can give you is the H&K USP. A fine sidearm; but definitely not a P7.
Did I mention that I actually have experience shooting both? SSG 69, you won't regret it. My only advise is to see if you can get a used one in excellent condition. The prices are pretty steep.
***ptp