I wouldn’t worry.  I look very different from the photo in my passport and never had any problems.  Can you maybe post a side by side photo comparison?

I think the officials are trained to look for particular facial structures, so your hairstyle should not be a problem. I recall reading on FlyerTalk about someone who had even changed his/her gender, and still continued using the old passport, although she had to occasionally point out the bone structure issue.

If you got stopped at passport control for a different hairstyle, then we’d all be in trouble. 

Keep your hair jerry curled, your colla’ popped & your linebeard sharp and it’ll be easy cuzzin

My boyfriend had dark, short hair and a lot of facial hair when we travelled. In his passport he has long, blond hair and no facial hair. He’s never had a problem. It made the scariest passport guys laugh. And he’s been everywhere with this passport. You’ll be fine.