I use both - if I am processing by hand, I use SS for 35mm. Hewes are head and shoulders above the rest, much easier to load, and they don't seem to go out of alignment. Some older SS reels that have been dropped or bent are impossible to load. I can finish processing one roll on a SS reel, and immediately load another roll onto the same reel. If I have one or 2 rolls, I use the SS and develop by hand.
If I am going to be processing a lot of film, I use plastic reels that fit in my Jobo Processor. Impossible to load when wet, but relatively easy when dry.
Practice with a dummy roll in the daylight. It will make it all much easier.