SPDR MSCI ACWI IMI vs Amundi Prime All Country World - higher diversification or lower TER?

Hello everyone, I am currently investing in the SPDR MSCI ACWI IMI as it covers the entire range in terms of markets and company size. The TER is 0.17%. For a long time now I have also been looking at the Amundi Prime All Country World, which does not include any small caps but only has a TER of 0.07%. Personally, I try to invest as broadly as possible and with as low costs as possible (I'm with ING) and I wonder which of the two is better in this regard. For which one