Copper v Nickel Plated

[Jokester]

I'm seeing that there is a lot more all copper blocks (top and bottom) and they do seem to make a slight difference to cooling presumably due to the copper tops also aiding with cooling because of their improved heat conductivity compared to acetal/acrylic.

But has anyone seen any direct comparisons between nickel plated blocks and their copper equivalents?

 

[Jokester]

Question answered I think, makes no difference.