Quality loss converting 320kbps mp3 to ogg?, Is it noticable? Options

[happyskeptic]

As my music collection is starting to take up a lot of space, and doesn't fit on my smartphone anymore I was thinking of converting only my 320kbps MP3s to ogg vorbis 128kbps or 192kbps.

Does anyone have any experience with the quality loss when doing this? I don't have high-end stereo equipment that I'll be playing the resultant Vorbis files on, just computer speakers, tv speakers and in-ear earphones on my smartphone

[saratoga]

As my music collection is starting to take up a lot of space, and doesn't fit on my smartphone anymore I was thinking of converting only my 320kbps MP3s to ogg vorbis 128kbps or 192kbps.

For portable listening on a phone, even 128kbps Vorbis might be a bit much. FWIW before flash memory got cheap I'd transcode all my high bitrate Lame VBR files to 90kbps AAC to listen on the go. Maybe not transparent under careful listening with difficult to encode samples, but not really something I noticed with real music in traffic . . .