Differences? They just sound a bit different hard to say how exactly. Funny because after playing each one I was like “right on I like that one the best” lol so whichever one I played last was my favorite . I guess if you play a 5er go with the SL 212 you will hear and feel the difference between the 10’s as it’s fuller. If you just slay all day on a passive p bass or jazz or if you play in a Marcus Miller tribute band grab the 4x10


