It's not so much trying to make them similar, it's just he has only really noticed the similarities. Too often when there is a rift he's either too busy fighting a demon or having to drag new people away from the fights, or even taking care of the injured.

Sam gives a small shake of his head. "I do not, except they're often in the Undercroft. I do know some individuals who have been interesting in studying the rifts though. Lady LeBlanc certainly is doing some or at least planning on doing some. Then that one elf woman, I forget her name, who is also a Rifter I believe has been looking into it."