No difference really at all, because obviously his 'opinion' on the evidence hasn't help the defense one bit so far. Maybe they are saving him for a 'fantastic finish' or a 'coup de grace' to the prosecution's case. :waitasec:
This might have made sense had the court started reviewing the DNA evidence, but as we all know that's been pushed back 40 days. So your conclusion (based on what by the way?) is premature.