Helix vs. Lame, Which one to choose at higher bitrates? Options

[Gainless]

So I've seen that Helix was rated equal if not superior to Lame at the last mp3 listening test. I've done a few tests with Helix on my own at 192 kbps with the result that it does a lot better than Lame on many "killer" samples. However there are issues with the handling of high frequencies at bass heavy material, e.g. that quite audible content is removed when a kick appears (was also noticed in this thread), which seems to be little dependent on how high the choosen bitrate/quality is.
From that perspective alone I would prefer Helix, also regarding the encoding speed, but I don't know if this is the only "Achilles heel" of this encoder. Are there any other reasons than the performance at high frequencies to choose Lame qualitywise over Helix?

This post has been edited by Gainless: Dec 31 2012, 04:41

[Gainless]

I think I've found the reason for the mentioned poor high frequency handling, at least in some cases. It seems to be simply a bug that content at the right beginning of a file is not encoded properly. If this "beginning" part is set somewhere else, everything's fine again. Can it be fixed somehow?