vorbis-tools: oggenc produces totally weird results

Hello!

I do recordings on my vserver, and copy over the results until now, reason was that calling oggenc did not really make things better, or even worse. Now, by sheer luck, i converted an .MP2 file like so

sox $f -t raw - | oggenc -r -R 22050 -q 4.2 -o ${f%%.mp2}.ogg -

and to my big surprise the result was much smaller than i expected. So i tested yesterdays' recording as such locally against the AlpineLinux one, and now see this:

This is my local box:

#?0|kent:recs.ambient$ ll seb-2022-09-18.*
-rw------- 1 steffen media 176543817 Sep 19 19:09 seb-2022-09-18.mp2
-r--r--r-- 1 steffen media 147534836 Sep 19 19:13 seb-2022-09-18.ogg
#?0|kent:recs.ambient$ ogginfo seb-2022-09-18.ogg
Processing file "seb-2022-09-18.ogg"...

New logical stream (#1, serial: 447dee4d): type vorbis
Vorbis headers parsed for stream 1, information follows...
Version: 0
Vendor: Xiph.Org libVorbis I 20200704 (Reducing Environment)
Channels: 2
Rate: 22050

Nominal bitrate: 79.466000 kb/s
Upper bitrate not set
Lower bitrate not set
Vorbis stream 1:
        Total data length: 147531171 bytes
        Playback length: 420m:20.440s
        Average bitrate: 46.797333 kb/s
Logical stream 1 ended

and this is the AlpineLinux -virt vserver:

#?0|sdaoden:steffen$ ll seb*
-rw-------    1 steffen  steffen  176543817 Sep 19 03:01 seb-2022-09-18.mp2
-rw-------    1 steffen  steffen  170883656 Sep 19 18:53 seb-2022-09-18.ogg
#?0|sdaoden:steffen$ ogginfo seb-2022-09-18.ogg
Processing file "seb-2022-09-18.ogg"...

New logical stream (#1, serial: 64dd76c1): type vorbis
Vorbis headers parsed for stream 1, information follows...
Version: 0
Vendor: Xiph.Org libVorbis I 20200704 (Reducing Environment)
Channels: 2
Rate: 22050

Nominal bitrate: 75.200000 kb/s
Upper bitrate not set
Lower bitrate not set
Vorbis stream 1:
        Total data length: 170879991 bytes
        Playback length: 420m:20.466s
        Average bitrate: 54.203593 kb/s
Logical stream 1 ended

Something is totally bogus with the AlpineLinux version regarding variable bitrate at least aka -q The CRUX-Linux variant is compiled via

# Depends on: curl libao libvorbis

name=vorbis-tools
version=1.4.2
release=1
source=(https://downloads.xiph.org/releases/vorbis/$name-$version.tar.gz)

build() {
        cd $name-$version

        ./configure \
                --prefix=/usr \
                --disable-nls \
                --enable-vcut

        make
        make DESTDIR=$PKG install

        rm -r $PKG/usr/share/doc
}