Not my specialism, sorry....Robbie might well know though. Dave Budd and Andy Mac too, they're metallugists
I know that bronze will bend while earlish iron, cast iron that is, not worked meteoritic stuff, will break. I know that hammered iron, properly tempered, beats them all into a cocked hat though.....where steel comes in
Bronze polishes beautifully, and gleams in contrast agin the silvery shine of polished iron when used as fixings.
The Romans were high on the whole status symbol thing for officers, so maybe ?
Copper tools, as stone carvers are very effective though, so that's a whole other matter, before someone asks. Basically the copper is soft enough that particle of granite become embedded in the edge so effectively it's stone cutting stone, not soft copper. Just like us drilling through stone with a wooden stick
I have to confess to becoming incredibly dubious about claims on reenactor sales sites.
Some are very, very, very good; very authentic, but there are an awful lot chasing sales and sometimes reality goes out the window when something that has an appeal looks like selling. Caveat emptor.
cheers,
Toddy