Hello,
It depends on what you use the most. The Pro 260 vacuum sealer is designed for people who use a lot of rolls. It stores two rolls at a time and has a cutter. It also has a fan to keep the engine cooler longer, so you can seal more at a time without taking a break.
The Pro 140 has a double heat strip, so every time you seal you put down two seals. It doesn't have the fan or the roll storage, but you can still use rolls with it.
They both have the same convenience functions like the pulse mode and the marinating mode.
I hope that helped! If you have any other questions, just ask!
Thanks,
Lisa