[wizardgus®]

According to the dictionary, “i.e.” means “that is to say” while “e.g.” means “for example”. So the difference would be as such:

“There are many ways to lose a race (i.e. there are a lot of obstacles to winning).”
“There are many ways to lose a race (e.g. disqualification, injury, sickness).”

The abbreviations i.e. and e.g. are not interchangeable – i.e. (id est) means “that is” or “in other words” and e.g. (exempli gratia) means “for example.” Both i.e. and e.g. must have commas after them as well as before them, unless they’re preceded by a dash or a parenthesis.

Vladimir likes pasta (e.g., cresti di gallo, orecchiette, vermicelli).
Estragon likes pasta (i.e., thin pieces of hardened, unleavened dough that are molded into various shapes).