If you're a huge grappling nerd I suppose.
For MMA, Hendricks-Brown is a better fight. They are more well-rounded guys, both of whom have provided a fair amount of action in their careers. Can't say the same about Shields at least.
And Palhares' caliber-wise is still quite untested at this weight. I think anybody touches his chin a few times before they get leg locked and he's going down. Historically he's been the type who needs to be the bully, and as soon as you start bullying back he relents quite quickly.
As for Shields' level, he has an incredible list of wins on his resume, and is a solid "fighter", but he's enjoyed quite the decision fortune in recent years.