ipa-debug versus ipa-ad-hoc differences?

I was testing using ipa-debug and unfortunately was thinking this was functionally equivalent to ipa-ad-hoc (except with debug symbols)... but now I am seeing behavior differences (maybe related to swfs with ABC or reloading?)   Anyway I am seeing freezes when loading up swf assets when I compile as ipa-ad-hoc, whereas it works fine with ipa-debug.

Does anyone know what basic differences there are? Are the secondary swf with ABC reloading restrictions only enforced with ipa-ad-hoc mode or something?