Temp. Rating - Alpha hose from Greenie (has been called Tornado hose) good to 311F
Longevity
Flexibility - Alpha
Burst Rating etc - Alpha 3000psi
Disadvantage of Alpha, it has a very rough exterior till it smooths out. It helps to spray it with silicone.
Parflex 230F and I forget the psi rating but its less than the Alpha
Its advantage is a smooth exterior and that it pinholes rather than bursts, from what I've heard.
Disadvantage: it is stiff to work with. Its flexibility is about half to 3/4 of Alpha