Hardtrance seem to be easy to ABX with most modern codecs. Even at high bitrates.
I find Lame harder to ABX from lossless, than both QAAC and Opus
Opus v1.1 vbr 320 (Actual output was 302kbps)
foo_abx 1.3.4 report
foobar2000 v1.2.9
2013/12/10 02:34:08
File A: C:\Users\Olav\Desktop\ABX\VBR320 - Steve Hill & Technikal - 2010 - Sawtooth Dentist - 02 - Sawtooth Dentist (Full Length Mix).opus
File B: C:\Users\Olav\Desktop\ABX\Steve Hill & Technikal - 2010 - Sawtooth Dentist - 02 - Sawtooth Dentist (Full Length Mix).wav
02:34:08 : Test started.
02:34:31 : 01/01 50.0%
02:34:49 : 02/02 25.0%
02:34:59 : 03/03 12.5%
02:35:13 : 04/04 6.3%
02:35:30 : 05/05 3.1%
02:35:33 : Test finished.
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Total: 5/5 (3.1%)
MP3 Lame v3.100a2 V0 (Actual output was 242kbps)
foo_abx 1.3.4 report
foobar2000 v1.2.9
2013/12/10 03:06:24
File A: C:\Users\Olav\Desktop\ABX\V0 - Steve Hill & Technikal - 2010 - Sawtooth Dentist - 02 - Sawtooth Dentist (Full Length Mix).mp3
File B: C:\Users\Olav\Desktop\ABX\Steve Hill & Technikal - 2010 - Sawtooth Dentist - 02 - Sawtooth Dentist (Full Length Mix).wav
03:06:24 : Test started.
03:06:37 : 01/01 50.0%
03:06:46 : 02/02 25.0%
03:06:52 : 02/03 50.0%
03:06:57 : 03/04 31.3%
03:07:01 : 04/05 18.8%
03:07:07 : 05/06 10.9%
03:07:12 : 06/07 6.3%
03:07:14 : Test finished.
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Total: 6/7 (6.3%)
QAAC v2.27 tvbr 127 (Actual output was 346kbps)
foo_abx 1.3.4 report
foobar2000 v1.2.9
2013/12/10 03:05:29
File A: C:\Users\Olav\Desktop\ABX\TVBR127 - Steve Hill & Technikal - 2010 - Sawtooth Dentist - 02 - Sawtooth Dentist (Full Length Mix).m4a
File B: C:\Users\Olav\Desktop\ABX\Steve Hill & Technikal - 2010 - Sawtooth Dentist - 02 - Sawtooth Dentist (Full Length Mix).wav
03:05:29 : Test started.
03:05:37 : 01/01 50.0%
03:05:41 : 02/02 25.0%
03:05:46 : 03/03 12.5%
03:05:50 : 04/04 6.3%
03:05:56 : 05/05 3.1%
03:05:58 : Test finished.
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Total: 5/5 (3.1%)