Like CD said, Stevens by a mile, but in the context of how the league was back then, his skill set fit perfectly. Big, hard hitting and extremely sound in his own zone, never mind taking into account the sheer terror he could instill into forwards crossing the blue line. I'd like to think the intimidation factor went a long way as well as his leadership skills, perfect player at the right time in how the game was played.
In todays game Neids would have the edge with his offense and skating ability. Just a sublime skater that could diffuse and shut down plays and go the other way with ease. His skating allowed him to do anything he wanted.
Both players put their offensive games on the shelf under Lemaire. Neids would be racking up a good amount of points now and people would be going gaga over his style of play. On that note, it often gets overlooked that Stevens put up some great numbers early on and was no slouch in that department at all.