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Check out www. Bokerusa.com
There you can pull up the specs on each razor.
From what I seen, the classic is Stainless, the cutter is carbon steel. That and blade etching.

Not sure, but I think it more depends on what interests you.
Round point/ square point.
Shouldered/ Shoulder less.
4,5, or 6/8.
Decorative spine.
Etching/ gold wash.
Scales.
Ect.

All I can...