i have both these blowers. one is last years model and the 420 is the new "improved model." there are a few differences but i am not happy with this machine. the air filter is completely different so now i have to buy two different ones for spares, but the filter cover is easier to take off. the gas tank doesnt have a knob that fits over the opening but rather a cap that sits inside like on the oil dipsticks of old mowers and some wheeled blowers. the biggest problem with this machine is the flexibility of the blower tube. right before the throttle handle the plastic is not reeinforced and bends easily (last yr model was hard plastic). with the cheap plastic you can not change direction at all with the blower tube, you need to blow forward not to the side at all. if you do move it the plastic will bend and the airflow will be shut off, you can hear the difference and i know this isnt good for the engine when you are on full throttle and the airflow is blocked. i can not use this machine in bushes near curbs, it is practically useless for my and most likely many of your needs. i will post pics of what i am talking bout tomorow. i just wanted to give others a heads up. i should have gotten a redmax or echo.