Burke
Treacle is unrefined syrup, the burnt bits at the bottom of the tub. Molasses are the same burnt bits but more of the invert sugar (fructose & glucose mostly) taken out. Molasses are definitely not as sweet as treacle, which itself is less sickly than golden syrup (which is how my gran used to describe syrup).

I have treacle on my porridge every morning, it is definitely not a popular sweetener judging by peoples reaction (except in my house).

But the brand I get is definitely quarried not mined. Sort of syruppy equivalent of opencaster sugar.... I'll get my sugar coat....