'much different to' is a correct and usable phrase in written English.
It can be used to indicate a contrast between two possibilities. Example: The new system is much different to the one we used before.
They are not much different to Tony Blair's principles: the difference is that the coalition government I serve in has stuck to them.
Their bodies are much different to men's bodies.
"Diesel trains are frankly not that much different to cars.
"It hasn't been much different to be honest," he said.
But it's not much different to what happens here.
"It doesn't feel much different to me," he said.
Mekas wants to show us that his life is not much different to anyone else's.
But playing sports, pitching -- somehow that became much different to him.
Instead, the real strength of the album isn't much different to that of their debut.
This year will be not much different to last year despite Peyton Manning's departure.
Others, you might be surprised to hear, are not really much different to Hackney Marshes.
