Don't worry about it.  It may not have been an "easier" testlet.  I thought the exact same thing after my FAR exam, I thought I failed because I convinced myself my second and third testlets were comparable to the first one.  Who knows?   But then when I started looking stuff up, some of the theory questions on the second and third testlets were on very picky details, and probably really weren't easy questions.  So, it's hard to even know if you got a medium or a hard testlet.  What's easy for one person is hard for another.  Worst case scenario, if you did get an easier third testlet, you can still pass if you did ok on the sims and written communication.  In fact, it is still possible to pass with three easier testlets, I think they call the easier ones "medium/hard" actually.  Just know that you did your best and don't let that bother you.  I obsessed about it, hence looking stuff up, lol.   It all worked out.