Help needed: genuine or fake? (Justin II solidus)

Oh, thank you very much for all the answers and advices!
I am really happy now that this Justin II solidus seems to be genuine!

However, this is the other solidus I mentioned earlier, from Justinian I.
Basically, it is a clean coin and the darker parts on the picture is due to the shadow of bends.
I checked hundreds of portray of Justinian I on his solidus on internet but the face on my coin significantly differs from the others. It's style is weird for me. What is your opinion about it? Have you ever seen similar ones?

 

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That type is really hard to get in perfect condition. Justinian had some inept mint employees Generally, Byzantine coinage is inferior in quality to Eastern Roman/ Imperial Rome.

 

Style varies pretty widely on these. Here are over 300 of them you can look at. I don't see anything wrong with this coin, either.