Best advice is to try and handle them before you deceide.
The 21 one gives you the most choices, as of today.
Different inlay's and blade configurations are avaliable, as well as 2 sizes.
This might matter if weight is a concern.
The 25 has a realy sharp blade with the large hollow grind. The action on mine is super smooth.
I got myself one just to see and my experience is: I like it a lot - it went directly in my EDC-rotation!
hope this helps.
red mag
The 21 one gives you the most choices, as of today.
Different inlay's and blade configurations are avaliable, as well as 2 sizes.
This might matter if weight is a concern.
The 25 has a realy sharp blade with the large hollow grind. The action on mine is super smooth.
I got myself one just to see and my experience is: I like it a lot - it went directly in my EDC-rotation!
hope this helps.
red mag