Difference of two temperature fields between two openFOAM projects

Hi there,
I am new to the functionality of the paraview program. I have two projects ng12 and ng6 with the same geometry but the number of elements in the grid is different. In this case, how can we obtain data on the difference between the two temperature fields of these projects to determine the error?
I uploaded two projects to disk.

I couldn’t download your data because I don’t have permissions. The usual way to compare data on two volumes occupying the same space but with different grids is to first run Resample With Dataset to first interpolate the fields from one grid to the other. You can then use the Append Attributes to combine the fields of two (or more) pipeline objects into the same dataset. Finally, you can use the Calculator filter to compute difference metrics between the two fields.

You can find more information about this process in other posts such as this one: Superposition effect - #17 by Kenneth_Moreland

I set the file permissions.
Could you please try again?

The link might be wrong. I still sends me to a login page and then a request for permissions.

<https:// drive. google. com/drive/folders/1Wnqunp_T-K5_lU4exNFQDgB25Fu2ztDa>

Maybe this will work?