^^ if you can get the A1923 lace up similar in price as the Guidi, I'd go for the A1923. Simone's recent work on footwear is second to none. i find A1923 seems to have more of a handmade artisan look and feel to it than Guidi's. fit is tts.
taking price out of the equation as they're both similar in price, I like IE for its construction and fabric. Luc also has some great fabric. But the seams always seem to blow. And that's sizing up one.