Is the 7mm Rem Mag just an overly loud 7x64 (.280 Rem)?

Pic coming from the .378 Wheatherby Magnum, opinions please thread at https://www.africahunting.com/threads/378-wheatherby-magnum-opinions-please.44959/page-4, where it was said about the .378 Wby "I can't think of a dangerous game situation where I couldn't make the exact same shot with a .375 with a bit less fuss and bother - certainly at 150 yards."

Top: Sauer 90 Luxus in 7mm Rem Mag with Swarovski 3-12x56 in Steyr QD mounts.

Bottom: Steyr Mannlicher Luxus in 7x64 with rail Schmidt & Bender 3-12x50 in Steyr QD mounts.

I love both and am supremely confident in both, and both have accounted for many, many heads of game, in Europe and in the US, but is the 7mm Rem Mag just an overly loud 7x64 (or .280 Rem, or should we push the point to even include the 7x57?) about which "I can't think of a game situation where I couldn't make the exact same shot with a 7x64 (.280 Rem) with a bit less fuss and bother - certainly at 150 yards"?

Or does the 7mm Rem Mag truly offer more, because it extends the reach? (at its own proportional cost of increased blast and recoil)

I never could decide, so I ended up owning one of each LOL LOL LOL

I personally prefer the 7x64 to the 7mm magnum. I don't need more "reach" than it offers.