PSS for sure. I'm on my 2nd set and when it comes time I'll probably buy a third set. I still have the pzero neros on my stock wheels and last month put them on the car for a week. The traction on the pss is a lot better. I felt like the pzero neros were bouncy, they have a softer sidewall so I felt like I was bouncing around a lot. At the same time there's something about the pzeros that make them feel rougher. I get to about 25 mph or lower and something about the tire just feels really off, like I've got bricks in my tires. They also make a lot more noise. The pss are quieter, smoother, and have better traction.