OK - hadn't actually thought about that. What's the difference normally?
In the past, I've actually found chip tricks to be harder to do with the tourney chips at our local casino, as they tended to be lightweight plastic and even slightly mismatched in size. Last time I played there they'd just upgraded to shiny new tourney chips that were properly matched and a better weight, basically the same as their cash game chips.
When I practice though I'm mostly using heavier clay chips with a lead centre.