I always thought Edgar came off as rather desperate, while Locke was more of a guy that was looking for "the right one".
Here's a description of the characters in question:

LOCKE:
"That girl is hot - hm - let's help her, but I'll consider whether or not I'm interested in her.
For now, I just want to make sure she's alright."


EDGAR:
"She's a girl! Time to flirt with her!"