Both grinders belong to the Eureka world, but they handle dosing differently: the Libra 65 AP works by weight, while the Mignon Specialità uses the classic timed approach.
Timer: simple and proven
With the Specialità, you program a grinding time. With consistent beans, this can work very well in everyday use. However, if the beans' age, hopper fill level, or grind size changes, the output amount can fluctuate slightly.
Grind by Weight: target weight directly
The Libra 65 AP weighs the coffee while grinding. This directly controls an important variable.
Which one is more affordable?
The Specialità is significantly cheaper and completely sufficient for many home baristas. If you weigh every dose anyway, you can work very precisely with it.
Which one is more convenient?
The Libra wins here. It reduces the need for weighing and making small adjustments, especially if you use the same beans every day.
What about single dosing?
If you frequently switch beans, you should consider a Varia VS4, Mahlkönig X64 SD, or Eureka Single Dose Pro instead of either hopper grinder.
Conclusion
Choose the Specialità for excellent value for money and timer convenience. Choose the Libra 65 AP if you want to integrate weight-based dosing directly into the grinder.
View the Eureka Specialità or Libra 65 AP.