Curious why you think a 610 is not a touring bike? Is it a grail touring bike like the others you mentioned? No. It's about one rung below them but it's definitely a touring bike, imo. I have an 1985 610 and a 1984 1000 and although I haven't taken either on any long tours, and probably won't, it seems like a tourer to me.
The geometry is similar, although the 610 is supposed to be slightly steeper, it's not a huge difference. Both came with fifteen speeds, sealed cartridge bearing hubs, 36/40 spoke wheels, double eyelets front and rear, mid fork rack mounts, water bottle mounts (two on the 610, three on the 1000), cantilevers...