"Better" is a funny word. Implies improvement in excellence or improvement in quality. Some issues with this idea are 1.) both excellence and quality are normally subjective and abstract terms. 2.) Better is transitory by definition if you keep mind that BEST is the goal. i.e. there is always something better???
One can eliminate some of the fuzzy logic for this word by establishing a standard or reference. Problem with that method is that it, by definition as above, 1.) is a snake eating its own tail. Transitory once the standard is met and a new standard defined. 2.) The standard itself is arbitrary and not often definitive. 3.) Unless the subject of better is limited to a single attribute it's meaning becomes compromised. 4.) The standard for better can and will become subject to ideologies driven by regulation, profit, power, market share, brand recognition, blah, blah, blah. 5.) Something as complicated as oil has a myriad of attributes that are, more often than not, in direct opposition to each other.
IF better bends it's will to #4 above, the entire vocabulary becomes corrupt. i.e. it looses meaning, becomes dilute and functionally unresponsive. So...
Again, quantify please and be specific.