well they could be, the magazine says (like the offspring) that unfortunately they don't have more info since they are new bands.
PS: there is Dexter's adress as contact adress with the band
But you said the Public Enemy on that tape is from Canada. The Public Enemy who sings songs like "Fight the Power" and "Bring the Noise" is from New York, which is in the United States. So, that's one reason I thought it wasn't the same Public Enemy.