I agree, neither snakes looks really thin. They all grow at different rates, and some get longer before they get thicker.

My hubby has a pinstripe girl, she is so short that she looks ridiculously fat, even though she isn't. She weighs the same as my cinnamon girl, but my cinnamon is a solid 8" longer and looks pitifully thin beside the pinstripe.

As long as both eat well and consistently for you, I wouldn't worry too much. When they start actively hunting a few days before the regular feeding day every week, that's usually the hint I rely on to bump up prey size.

Gale