I've had the Husky's for almost a year now, and Dad got the WeatherTech's in his Tundra.
My folks live up in the mountains of TN, and have been renovating a house. The driveway slope is graveled and rutted pretty badly, but the area near the house where everyone parks is a clay mess. Dad hates the WT because his feet always slip and slide when getting in/out of truck. He very much preferred the Husky's in my truck which provided better traction making it easier for the old man to get in/out even though the ground clearance is higher. Having driven his Tundra more than a few times for troubleshooting or hauling the boat, I can say that the WT's are absolutely a smoother less flexible plastic that doesn't provide the grip that the Husky's do.
I've put just about everything you can from outside onto the Husky's and been very happy with how they fit, feel, and hold. I always feel like I'm scratching the crap out of them when I've got rough dirt or sand down there, but they show very little wear. Dad's WT's looked significantly more scratched up, although they're a few years older.
Overall fit has been good, the Husky's just don't move. I've managed to get the cargo mat to slide a little when trying to slide a 150lb rubbermaid container of ammo across it. The rear lip of that mat has also suffered a little deformation from getting smashed forward or back while loading cargo. It springs back into place, but permanently has a little wave to it horizontally.
Having experienced both, I prefer the Husky's for the grip. They seem to look and hold up better. I'm also not a fan of the hard plastic feel of the WT's.