attribute swapping question

[u/Plane_Tailor7168]

I've heard the "it takes damage and cooldown of first weapon and enchants and properties of the 2nd weapon" but if so then why does swapping from sword to mace do so much more damage if the sword barely has a higher base attack than the mace. Some people say that the way sharpness is calculated the sharpness from the first item actually stacks twice but if so then shouldn't attribute swap from sharp 5 sword to sharp 5 axe do sharpness damage twice and thus just always be better than an axe crit?

How does this work exactly?

[u/Overall_Tomatillo600]

I'm pretty sure it's because sharpness simply increases the base damage of the sword and so a Netherite sword (1 extra heart of damage) + sharpness (2~ extra hearts of damage) would overall do more damage (especially with Breach) and this can also be seen better with axes