[Brightcolours]

Toni, it is not even about the same noise. Most cameras do well, noise wise, over a whole range of ISO settings. My point if more about that you just can get the same exposure values and flash fill in with both systems, even when using equivalent apertures. Simply adapt the ISO setting to the requirement at hand.

 

And yes, your 750D has much better higher ISO performance than your 30D. My 6D has much better performance too than the 1Ds mk II. Technology has indeed advanced.