if Apple AAC encoder had "a dynamic range compression problems, terrible pre-echo problems and tvbr bugs" then it could be reflected in the results of public tests.It's not the case.
If You are OK with both Apple and FhG why care about someone's opinion? Both encoders have high quality. It's your ears. We are all different.In case of a spoted artifacts You can simply try both encoders for yourself and/or jump to high bitrate.P.S. FhG AAC encoder is relatively new here so it got less issue reports.