From my personal experiences (as -Ti myself) and observations:

ILE-Ne seems more like the crazy inventor archetype. "I just had this amazing idea! It's glorious! You must hear about it!" would be something you could easily imagine an ILE-Ne say. Overall, they are much more outgoing and loose, for the lack of a better word. They are much more entertaining, in my opinion, and they thrive on getting other people interested in whatever crazy idea they have at the moment.

ILE-Ti seems much more subdued in comparison. Their ideas may still be quite unorthodox, but they are usually aimed at a certain goal, they are not just something randomly pulled out of the air. Their demeanour is more reserved, and they do not seek the spotlight as much, preferring to stay on the sidelines. Could easily be mistaken for introverts on occasion, but they do get increasingly *lonely* when left alone.