Question: I am not a native speaker therefore I would be grateful if someone could explain me what is the diferrence between "minute by minute" and "minute after minute". Thank you.

Answer: 
If you're open to idioms, you could say that these people are [**cut from the same cloth**](http://www.oxforddictionaries.com/definition/english/cut-from-the-same-cloth?q=cut%20from%20the%20same%20cloth).

> 
> Of the same nature; similar:
> 
> 
> *don’t assume all women are cut from the same cloth*
> 
> 
> 

Or they're [**like (two) peas in a pod**](http://www.oxforddictionaries.com/definition/english/like-peas-or-two-peas-in-a-pod?q=peas%20in%20a%20pod)

> 
> So similar as to be indistinguishable or nearly so:
> 
> 
> *they were like two peas in a pod, both with the same high cheekbones and hairline*
> 
> 
>
[Dead Ringer](http://dictionary.reference.com/browse/dead+ringer) (for someone/something)