They look remarkably the same! Very little if any noticeable shoulder.
There are HUNDREDS of metric calibers out there and some are a fraction of a mm apart. The 9.3x72r is a blackpowder era cartridge, the 9.3x74r is a "big boy" capable of doing the same things as a 375HH. Pick up a copy of Cartridges of the World to see a partial sampling of the numerous metric cartridges invented over the last 150 years. It's a very useful reference item.
). DM incoming.