I thought all WRX's had UEL's until after Version 9 (Hawkeye's) then the JDM line, all the 2 Litre WRX STI's, S-GT's etc had equal length, and the AUDM, NZDM, USDM 2.5 Litre variants had equal length? Could be wrong.
While all WRX STI's are increasing in value pretty rapidly, the Blobeye will undoubtedly be increasing more and have more value in the future since they're a lot less common than V7's (Which seem to be everywhere). You'll pay more but I reckon it's a better trade-off and a better looking car!