SD vs microSD

Hello,

if the speed and quality of solid state memory depend by internal
 controller , what could be better SD or microSD 
 ?
For example main difference by SSD and a SD is the internal
 controller ( a SSD have many arm cpu as internal controller ) ,
 so a SD could be better than a microSD because 
SD have more
 space to put inside a better controller.

Is it true  ?

Regards
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