Hi Lord. The difference between episode and chapter is a criteria of medium. Chapter (derived from lat. "capitulum") is normally meant as a section of text. As for "Episode" originally can be defined as "an incident or action standing out by itself, but more or less connected with a complete series of events." (yes I quoted that out of wiktionary, but it is quite accurate.) This definition is much more leaning towards the thought of an image (which is why episodes normally are single installments within a series in TV, Netflix or even movies. Yes, all those Marvel movies could be counted as episodes themselves, though no one does that because it'd be confusing they rather use "sequel").
Thus this really is the question of definition since comics basically are somewhere inbetween: They have text AND are visual. So no, like endlessuprising, said: It does or should not matter too much. Maybe it only shows if the creator / author is more thinking of his work as some kind of series or a novel. ^^