Judge for yourself:
On the other hand, I have to hand it to them: For three women all caught up in the Southern gothic schtick, they couldn’t have picked a better name for their album than Lake Bottom.

Also, I search YouTube and found some footage of The Kransky Sisters that wasn't up the last time I checked. You have to admit: The two bands have a similar take on the the three-woman harmony. Watch the below video, but fast-forward past the jokes to 2:30 if you just want to hear the vocal similarities.
Also, I can't help but notice that, like The Chapin Sisters, The Kransky Sisters have one member with a different father than the other two. The Kranskys, at least, make a point of mentioning this as often as possible.