RE: APC-E vs. APC-EW
I flew three props on my Xtra 25-13 this year, all APC. The first was a 18x12E. It had decent power and pulled 65A. Then I tried the 19x12WE. It had similar speed, but definitely pulled through uplines and over the top better, again at 65A, so I stuck with it. I tried the 19x12E, but it over-current shutdown my 55A ESC (about 74A on the wattmeter was the highest stick position I could get to). I tried a 19x12E cut down by about 0.5inches diameter, pulling 73A static. It wasn't any better in the air, and over-temp shutdown my 55A ESC after about 3 minutes of flight.
Chad has a lot more experience with various APC props. I'll try to get him to post.
-Adam