Well, if I (in some strange way) was 100% sure that I whould die if I fougth him fair, then I whouldn't. Then I whould run... and if I knew that was 100% impossible... then I whould take the gun. But as long as he wasn't an sword-immune-but-still-vurnable-to-guns-guy, then I whould chose to figth with sword.

Another task for you Snowman... place all the swordtypes that you know in a rank list. The one you think has the most advantage first etc.