Ergonomically the position that Mac keyboards position the Command key (their Ctrl equivalent) I feel is better, which is to the immediate left of the spacebar.
With the Caps Lock position one has to use the pinky to hold it down and the index finger has to stretch more to reach Ctrl+V (unless some use their thumb to hit the V key?). While with Mac style placement you use a thumb for holding the key which naturally occupies the bottom-most row for spacebar, so less finger travel and stretching.
For most Mac applications I've used the equivalent Ctrl+<key> functions are mapped to Cmd+<key>, most obviously for cross-platform applications but also generally copy/paste/etc.
My comment was just about the positioning of the key however. I use a keyboard with programmable firmware so I can remap the actual Ctrl key to the same position since it's more comfortable.
In the Mac world, Command has always been the standardized main hotkey ingredient for every GUI application. Of all the Mac quirks, it's the most fortuitous one in my opinion that they started out with only Command (and Option*), since they only had the GUI, then when they were in a mild "compatibility" phase in the 90s they were able to separately add Ctrl and define Alt as a synonym for Option.
Historically pre-UNIX-based-OS Ctrl was lightly used in massive applications that needed more hotkey possibilities (e.g. Photoshop), or used for running PC emulators like Virtual PC. And for the few people on Macs using a terminal to connect to Unix hosts.
Then Mac OS X hit, and it was a happy coincidence that now in a Terminal, you can hit Command-C to copy some text, completely outside the scope of the process running there, or separately, do a Ctrl-C to break the process.
*Mac uses option (Alt) at the OS layer too, but it's to compose variøüs diacriticals and (√•§¢) symbols, so it's highly frowned upon to use "alone" (as in "Option-V" because that should be dedicated to making the √ symbol) - but it's frequently used in combination with Command.
It's used for OS-level commands: copy (⌘-C), paste (⌘-V), select all (⌘-A), page up/down (⌘-shift-up/down), paste as plain text (⌘-shift-V), Spotlight search (⌘-space), show all windows (⌘-up), show application windows (⌘-down), search app help (⌘-?), move desktops (⌘-left/right), etc. etc. etc.
With the Caps Lock position one has to use the pinky to hold it down and the index finger has to stretch more to reach Ctrl+V (unless some use their thumb to hit the V key?). While with Mac style placement you use a thumb for holding the key which naturally occupies the bottom-most row for spacebar, so less finger travel and stretching.