Are AWS ElastiCache Reserved instances size-flexible?

Question

I am currently looking into purchasing a bunch of ElasiCache reserved instances.

I know from EC2 and RDS, that it does not matter if you purchase e.g. a t3.medium or 2 t3.small instances, because the reserved instances are size-flexible

Is this also the case for reserved ElasiCache instances?

I can not find any hint about it here or here...

Answer 1

To answer my own question, the answer is no.

I found this in the Recomendation page: