They made a little chart in the updates for the add ons and what is included in what.
The 25 euro upgrade level is the new cards, the new power tiles, and the included stretch goals. The majority of the minis come in the original version of the game at that level. The purpose of this is to let players take the old game and replace the game elements they are upgrading or changing and play the new game without all the flashy new bit (like the new stacking pyramids. In the original game they are oversized
d4s.
The 69 version is the whole 2.0 game which includes all the miniatures.
You can see the savings in that chart.