An interesting Common Redstart superficially resembling subspecies samamisicus has been holding territory in Oulu, Northern Finland at least from 2nd of May when it was discovered by Toni Eskelin. A few documentary shots can be viewed here (the last 3 pics):
The bird appears be adult (+2cy) male and perhaps you would expect such an individual to have more obvious wing panel? A few individuals for comparison:
I don't know if it is visible from the pics but the bird in question was clearly a shade darker than normal nominate Common Redstart.
There is also a recording of a song, direct link:
I consider the song to be perfectly normal for nominate Common Redstart. There is no recording of the call, but also that was similar to nominate. Therefore I don't think that this individual is at least typical samamisicus, but what is it, then? An intergrade, or just a strange variant of nominate phoenicurus? It would be interesting to share your ideas.