N64 would have had more games.... and cheaper prices on them.
Sometimes storage space might even have held back certain things (textures, sounds tracks ect), and haveing CDs could have resulted in better looking/sounding games. All this together, could probably mean the hardware sales would have been slightly higher too.
Necro-bump this 2020: http://gamrconnect.vgchartz.com/thread.php?id=229249
Bumb in 2021: http://gamrconnect.vgchartz.com/post.php?id=9047071