I think that, while both have a very pleasant bouquet, the regular has heavy, earthy tones. This fine quality fuel has a burnished gold color, deep complex nose of ripe mango and apricot and rich, viscous flavors that are more like nectarines and apricots. The oil is sweet (22.8% residual), silky and with good length and the reasonable price per gallon allows for a taste of one of the world's true limited octane treasures.
The high octane supreme gasoline from Saudi Arabia's historic oilfields--some of the derricks are over 30 years old--have yielded vintage petroleum that is, well, pretty classic, with rich ruby color and a spicy aroma loaded with black pepper, and licorice/ dry fennel . That spiciness, especially the fennel, carries all the way through a long, satisfying drive home. The petrol is generous and chewy without being overwhelmingly dense, which is one reason it's such a good food petroleum product.