Started my 7 year old girl (she is small for her age, only 40lbs) on a tiny chinese 4 wheeler cause she was not too good on 2 wheeler yet, within 2 months she was on a PW50, good size and easy to ride, but dad had to start it all the time for her. We soon got a TTR50 electric start. Now wer'e talking! Perfect!
If choosing from the 2 you list, I'd get the honda 50 over the PW. Its auto clutch and has the brakes in the right places! PW is hand brake only.