I'm not familiar with the 3W-24 but I have both the MVVS 160 and the RCS 140. The RCS does EVERYTHING better than the MVVS. It spins an 18/6 Pro Zinger 200 RPM more, has better throttle response, and burns less fuel. Plus the MVVS is very difficult to hand start, in fact its so bad it's now sitting on a shelf, Oh and the ignition unit fails about every 3 hours of run time, I'm on my 3rd and its bad.
I suggest you choose between the 3W-24 and the RCS 140