The first one is one of the off-topic close reasons set by moderators.
The second one is the generic off-topic flag reason which is worded differently on the website: “Blatantly off-topic (this question has nothing to do with $TOPIC)”. This reason only appears in the flag dialog, close voters instead get “Other (add a comment explaining what is wrong)”.
See also the same bug report on Computer Science.
The best solution would be to reintroduce the “off-topic” close reason, as opposed to its current inconsistent incarnation where depending on whether you're flagging or closing, you get different options, and sites only have a generic off-topic reason for closing if one is set by a moderator.