I like to see the differences in the way the metal decoration was done.
I don't know, but I am going to put this pout there:
For example, the buttcap shows it was pounded on the inside, which means any pre cast decoration would be damaged. So this would have been engraved AFTER the forming.
The pommel cap, guard and side plate needed no forming, and I believe they were cast with the detail cast right in, not chiseled later.
I say this, because I have been studying some German hdw, and it has all appearances of the detail being cast, with no evidence of chisel marks or cleanup cuts from engravers showing, even deep down in the grooves and whorls.
I put this out there, because I want to know how this stuff was made.