Yes the Time Fantasy and Elements are different styles, for the characters at least they aren't meant to work together.
You can mix the new Elements tiles with the old TF characters because they use the same tile-base-size and recoloring them to match is fairly straightforward. I've written a guide on how to match the colors here: https://www.patreon.com/posts/matching-tf-to-78045454
Hopefully that helps. thanks!
Thank you for the quick response! What I'm really after is essentially a handful of character sprites/assets that match the classic fantasy archetypes of warrior, priest, mage, knight, thief, etc. that are available in the Fantasy assets but in the elements style. If that's available somewhere I'd gladly buy it.
