Well, I've grown and saved seeds from Thai 'Siam Queen' many times -- if the blooms are in heads / clusters rather than is spikes (like Salvia or like other basils), then that's what you have.
Otherwise it might be another Thai type, like Cinnamon basil.
I grow a lot of basil varieties for their scent and as attractive "fillers" in the garden... only use a few for cooking.