WI Stirrups of Ambrosius Aurelianus?

I have been reading recently about sarmatian stirrups. Apparently they were excavated in Kuban and dated first century BC. There is discussion whenever they were merely mounting aid or used in combat. And we know that some sarmatians were settled in Britain and remained there till the end of roman rule. So lets say some inventive britton king figures their use and equip his cavalry with them. How much of a difference would that make?
 
Top