I have a Turnigy electric prop as well. I also noticed less current draw with the Turnigy, but also a lot less 'pull'. The plane really jumps out of the pits and off the ground with the APC, needs a bit more throttle and time with the Turnigy. APC seems to be a stronger prop, but if the Turnigy fixes your noise issues and gives satisfactory performance, then that's great.

I guess you could try a Turnigy 19x10 as you now can afford a little more current usage. Don't think they have an 18x12, but Xoar has 18x12 and 18x13 electric props.

I'm thinking hard about a prop change for this season. Currently using 10S and an APC 18x12e. Might try an 18x12 carbon, or possibly an APC 18x12 glow prop. Hearing a lot lately about electric propeller inefficiency at larger diameters and the RPM we're running. Basically people say to expect LESS current draw with a heavier prop. More pull, more efficiency, at the sacrifice of roughly 2oz with APC glow, much less with carbon.