Yes we should listen as that is the law. They are not quite the same though and not just being different facts.
OJ was a popular and rich celebrity. Zimmerman, not so much.
The one juror that spoke after the Zimmerman verdict said that the jury "wanted to" convict him of murder but the evidence simply was not there. I think the jury in the Simpson trial had the exact opposite take and it was a case of jury nullification. If they "wanted to" convict him, they would have.
Both certainly reach the same legal standing and they are both not guilty. There is a huge difference in the way the cases were handled and the popularity of the suspects however.