His odds are worse under the federal indictment. Federal prosecutors are talented individuals. State District Attorneys tend to be inept people. Federal prosecutors are clean, efficient, skilled, and have an overwhelming success rate.
His chances at plea bargaining also significantly decreases in federal court. State courts are more overwhelmed and therefore more apt to allow defendants to plea. That incentive isn't there in federal court.
Also, the federal violations can be a lot harsher because they compound easier. So, while under state law he might just be guilty of dog fighting, under federal law, the same activity can all of the sudden be gambling, conspiracy to commit gambling, mail fraud, interstate criminal behavior, income tax invasion and a host of other things all associated with the dog fighting, gambling, and payment of monies surrounding the gambling.