The 150 drag eyes is the one that lets you choose anything, idk what the 25 drag eyes does or if it even exists, but theres no way they give you 100% eidos or limited himes with just 25 eyes, thats reserved for the 150 eyes one.
Their stats arent amazing, its the bonus that makes them op if you have 6+ weapons of that type, people just use 1 phantom weapon along with 6+ weapons (flbed usually) of that same type for the bonus, they tried to make rainbow work with ssr diabolos and phantom weapons but its just bad, just get 1 phantom weapon that matches your weapon grid and call it a day.