4 season is basically an updated improvement over the Gatorskin. The 4 season is lighter, rides better, has minimally lower rolling resistance, and probably has better traction. It’s a great summer tire (don’t let the name fool ya).

I have used the Gatorskin in high power situations, and it refuses to wear out. Seems to last forever (apparently, I don’t skid as much as some around here, lol). 4season wears well if that is important to you but doesn’t seem to last as long.

For me, its easy to choose 4 season, but the Gatorskin is pretty tough. I like the 32mm size – where the differences are a bit more noticeable.

The 28mm GP4000 (measuring 31mm) (or 32mm GP5000) are great tires and the latter is even tubeless. They ride better, have less rolling resistance, and are lighter. The sidewalls are not as tough.

Oddly the 28mm GP4000 is about 4mm wider than the 28mm GP4season or Gatorskin. I have a 10-year 32mm old Gatorskin that is slightly smaller than the 28mm 4Season. Go figure.