This question rears its head from time to time. It's not quite so simple, and my response is not going to be very useful. However, the following may help explain why this question is not so simple.
If I use the word alcohol, am I referencing methanol, ethanol, butanol, another alcohol .. which one? You can't tell because alcohol is not sufficiently descriptive.
Using PEA (polyetheramine) is the same - which PEA?
If you compare percentage PEA from MSDSs, you may get know which product has more PEA, but you don't get to know which product has the most "bang for the buck". They are not all equally effective and their characteristics as fuel additives are very proprietary.
This family of molecules is large and has varied uses, including uses unrelated to fuel. The chemistry for fuel-additive-type PEAs can be explained as follows:
PEAs can be represented by the formula R[OCH2CH(R1)]nA.
R is a hydrocarbyl group;
R1 is selected from the group consisting of hydrogen, hydrocarbyl groups of 1 to 16 carbon atoms, and mixtures thereof;
n is a number from 2 to about 50;
A is selected from the group consisting of — OCH2CH2CH2NR2R2 and -NR3R3 wherein each R2 is independently hydrogen or hydrocarbyl; each R3 is independently hydrogen, hydrocarbyl or — [R4N(R5)]PR6 wherein R4 is C2 — Ci0 alkylene; R5 and R6 are independently hydrogen or hydrocarbyl; p is a number from 1-7.
Most, if not all, of the molecules that fit the description above can be used to clean fuel systems, injectors, valves, and even piston tops. However, they are not equally effective.