The 'two factors' are not two factors. Frequency range, bit depth, and whatever lossy algorithm is used, all play a role. A lossless rip matches the original audio as stored on the CD. A lossy rip will commonly 'lose' between 8-12x of that information. Lossy audio, like mp3 and m4a, 'throw away' information that is otherwise maintained in a lossless audio file. Hearing the difference is not being questioned, but the integrity.
Oh OK, so you're specifically talking about bitrate difference. I wouldn't agree that that 8x higher bitrate means the file is 8x more accurate, but I get your point now.
You continue to misrepresent my responses. Are you trolling? I did not say and was not 'specifically talking about bitrate difference'. Frequency range, bit depth, and whatever lossy algorithm is used, all play a role, is plain to see.
>...How did you calculate a factor by which lossless is better than lossy?
I specifically typed accurate, not better.