If it doesn't state anything special it is standard fuel. 80% synthetic/20% castor lube package. Their straight synthetic states so on the label.
There is no difference between the 2 cycle and 4 cycle fuel with the same specs, except for the label. They, along with others label some for 2 cycle and some for 4 cycle just so the uninformed customer knows they are getting the right stuff. Prevents confusion and worry.
I have run the same stuff in both for years, no problems.