For instance, everyone knows that Intel's 22nm process is actually 26nm - taken from the measure of the gate length.
Similarly ST's 28nm FD-SOI process is actually a 24nm process measured by gate length.
A 2nm difference in gate length shows Intel's much-vaunted process lead is not so big as it might appear.
The gate length on ST's 20nm/14nm process is 18nm.
Interestingly, it transpires that TSMC's 16nm process was so named because 14 is an unlucky number in Chinese.
So much for science.