If you compare a MicroSD card with an advertised speed of 48 MB/S to a full size SD card with an advertised speed of 48 MB/S (from the same manufacturer), should their performances be identical?

Or is there anything about the size reduction of a MicroSD card that makes it perform better or worse?

Similarly if you take that MicroSD card, and place it in a MicroSD-to-full-size-SD converter (from the same manufacturer), will it perform identically to the equivalent full size SD card?

As examples, one could compare the SanDisk Ultra PLUS microSDXC card with the SanDisk Ultra PLUS SDHC card. In this example, the comparison would be both with and without the MicroSD-to-full-size-SD converter.

BTW, on the packaging, the specs are identical, but I'm interested in knowing if, in the real world, there are any performance differences.