Is Devo;per bootloader the same thing as "Unlocked'?

I am on PB1 Rooted with dev-mod bootloader. I want to upgrade to PF4 rooted, but am not entirely clear which version to use.
"Locked" or 'Unlocked" The whole parenthesis thing just adds more confusion for me. I don't need de-odexed, I just want to run stock rom.
Thank you for any help I can get. :D

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