Please read the small print !, firedragon was asking about the PA38 !!!!!! not the PA28 vs the C150/152
In my opinion the PA38 is a much better trainer as it stalls a little unpredictably and exibits all the classic spin syimptoms and demands the proper recovery to be made.
the cessna ,s stall is a non-event and the spin recovery can be "just let go of the controls"
The visibility out of the PA38 is better.
The best thing about the C150 was the 40 flap setting as it could get you into a realy small field its just a pitty this was removed from the C152.
The only problem that a low time pilot is likly to have with the Cessna is on landing , it is quite easy to over control in pitch so if you are not happy with the way the touchdown is going then go-around ,countless Cessna nose legs have been knocked of by PIO.
The biggest down side to the PA38 is the 11000 hour fatigue life on the main spar , so some PA38,s are nearing the end of there lives the cessna has no fatgue problems.