KeePass is made in C#, KeePassXC is made in C++. That alone might make your life easier if you need to use it in Mac or Linux, because I've found making Keepass

KeePass is made in C#, KeePassXC is made in C++. That alone might make your life easier if you need to use it in Mac or Linux, because I've found making Keepass' C# plugins work on mono is tricky, while KeePassXC doesn't need plugins for my use cases. Edit: Looks like KeePassXC doesn't support plugins, and I hadn't noticed :/