HELP: Fenix 6 or Fenix 6X?

Hello community, 

First off all I apologize if there is another thread at this forum, but I could not found it... Anyway my brother is going to US in 15 days and I want to change my watch due to bigger screen... I have low vision accuracy (<10%) and I have a FR645M... I just run (no bike, swimming, etc). I really want to try a Fenix 6X, but my wife thing it will be huge for me... She think I should try a Fenix 6... I am 176cm, 78kg and my left wrist have 16,5cm...

Can someone from our community who have similar wrist size post a photo using the Fenix 6 and/or Fenix 6X to help me choosing the best for me? 
unfortunately I am not able to put both on my wrist to try before my brother travel so it will be a shot in the dark...

Best regards...