Hey man I've been to both DA and SJSU. If you really can't get into the UC's or private schools, I suggest you try to get in SDSU or Cal Poly SLO before either SFSU or SJSU. SDSU is tiers above the rest in business. And any school that starts with a CSU is no good.
If your options are limited to SFSU/SJSU, I'd pick the one where you will have the most fun. They are very similar academically but SJSU is more of a commuter school I think (I haven't been to SFSU much). Just my 2 cents.
Thanks for the advice man. I'm currently weighing in all options, including USC mentioned by the other guy lol.