The regular version has strict dependencies (version ==), the -unlocked version does not (version >=). With -unlocked, you can upgrade the stuff Nokia ships beyond the version they ship without having to remove osso-software-version. Side note to everybody. Please make sure you install the right version for your device (osso-software-version-rx34 for N800 and osso-software-version-rx44 for N810), or else a kernel/initfs upgrade may drop you into a reboot loop.