Yes, the second option seems to be a subset of the first. I am not an expert, but I have been training with custom installations for the last 48 hours (with a few interruptions.) Remember when you installed xcode, he asked if you want to install "system support" (or system tools) and / unix tools "? Well, you can remove any or all of them.
Just enter this: sudo / Developer / Library / uninstall-devtools --help
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