Is reduction potential equivalent to the ease of discharge? Loosely speaking, is the reduction potential equivalent to the ease of discharge in the context of electrolysis? 

i.e. is it easier to discharge an ion with a higher reduction potential as opposed to one with a lower one?
Easy is a big word. 

Lower potential means it requires less energy, but that doesn't say anything about how quick the reaction will proceed.

A low potential reaction may still have slow kinetics and therefore not be "easy".

If you are comparing ions as to which will produce more product as a result of an electrochemical reaction, you need to find something with low potential and fast kinetics.