Thanks for the reply. I suspect the same, I just wish TG73 was a bit softer (might to do an MTO for their soft chisel). It's funny because the GG06 feels roomier everywhere else, except the instep. Just keep trying to make sense of that.The TG73 last is probably a better fit for you based on your commentary around more comfort and less creasing.
I have limited experience with the TG73 last, as I've only tried it on, so other folks can chime in more. But it definitely had more room in the instep than my GG06. A bit less of a gap in the lacing and it feels like having a tad bit more width in general, likely due to the contours of the last.
I suppose time will tell, as I wear the GG06 a few more times and actually walk in them for some distance. I've attached some pictures I took yesterday of the GG06 - purely for demonstration. I don't think it fits poorly (though the slight crease after the cap annoy me a little), but after couple of hours I can feel a bit of pressure around the 2nd and 3rd line of the laces.
Again though, they've been worn less than the TG73 (maybe worn out 3 times, and not a lot of walking, just a lot of sitting in the office). Loosening the laces like 1-2mm, which translates to about 1.2cm - 1.3 cm at the top of the laces, usually makes a pretty big difference. However, happy to keep hearing other people's thoughts on this especially since I'm sure most people on here have more experience with G&G shoes.