The difference is the WW is a leaked version that does not have the full implementation of what Acer is releasing as far as I know anyway. Either way people want the real OTA I am guessing so they can test root and what not.
SG Note 3, Samsung Galaxy S4 Zoom
Acer Iconia A500
T-Mobile Dash, T-Mobile Wing, iPhone 3g, Garminfone, HTC G2, MyTouch 4G, Motorola Atrix, Motorola Atrix 2, Samsung Skyrocket, HTC Titan, SGSII, LG Thrill, HTC Vivid, SGSIII
And a Long list of Stuff Prior to Smart Phone Existence.