I’ve never been to Five Guys, but I understand they’re pricier than a $3.05 In-N-Out Double Double.....and I highly doubt they could beat the quality and flavor.
I've never been to In-N-Out (never even seen one), but we do have a Five Guys in the area. The burgers are about as close to home-made as I've ever had, and the fries... oh wow, the fries. Dude. The only place I've ever gotten better fries is at a local fish and chips joint.
It's about six or seven bucks for a complete set (burger-fries-beverage), but definitely worth it.