RE: What has more power, a Saito 1.80 or a Moki 1.80?
I've tried both engines in my Kangke CAP232 25% and the Moki 1.80 is waaay better, trust me. I would use a Perry pump if I were you. That way the engine runs the same mixture full to empty tank and the CG is perfect for the entire flight. That's my setup and it's very impressive. Hovering is at just under half throttle on my 14 lb plane. The Moki will burn less fuel so you can use a 16 oz tank for about 9-10 minute 3D flying with an ounce or two left. WOT is about 8 minutes with an ounce left. Also the Morgan 0% nitro fuel is about $9 a gallon vs the 30% heli that you need on the Saito ($25 a gallon). Use a Bambula 18-8 wood or Menz S 19-8. I love these engines. A gallon of fuel will last me a couple of weekends flying both days.
The Moki will turn one to two prop sizes higher than the Saito 180.