I just measured them to the bottom of the lid. My Gen3 P is same as Gen4 P without the metal table at 33.4". They sit lot higher than Gen1 SS or the Gen2. New MT at 32" and other reg kettles at 29". Gen1 SS P will be about 30"-31" range.
So, the new Performer will be lot higher. Next is New MT, then Gen1 SS P.