I'm looking to add a Manfrotto Magic Arm to my kit, and I've been looking at the Manfrotto 143 and 244. It doesn't really seem to be a big difference? They have the same max load capacity. I'm thinking of using it with a magic clamp for lights.
If there isn't any real difference between the two, I will probably go for a Manfrotto 143 Magic Arm kit, which comes with Camera/Umbrella Bracket 143BKT, Super Clamp 035, Backlite Base 003.
Any thoughts or experience with these two?

now I understand... Well, it seems it's a no-brainer then. Safety before all 
