The normal two tone 36mms were way lighter.
As my as I know that gap between two tone reps and gen is between 5-20 grams max.
The gap between rep day date 40 to gen is between 75-100 grams.
All depends on the number of watch links.
So you understand that an average 12 grams on two tone doesn't make any difference unless you traveling with a digital scale alongside with you.
The 85 grams average difference on the day date 40 is super noticeable on your hand and wrist.
I'm talking from experience on both 18k solid reps and gens.
I know someone who living 45 minutes from my place who secretly sells this 18k solid reps, price is really high.
Last time I visited there I tried 18k solid rose gold 5711r patek and a rootbeer gmt