I prefer the uglier valve cover. Not because it's tougher, it just matches the rest of my bike.
I wreck my bike intentionally for the fun of it so my valve covers take some regular abuse. The 80s style cover can take a pounding. Do a donut grinding your valve cover and grab the front brake some time. It's a hoot!
Word of advice if it tries to pitch you: don't try to hold on. Your wrist will hate you.