Not sure what you're saying.
I have installed Ernie the Gunsmith springs in several X-Mark Pro triggers, also set around 2.5 pounds.
With minimal breakin they have a smooth pull with a crisp break.
The pictured X-Mark (non-Pro) has no external adjustment and must be removed from the stock to adjust, so how is it "quite adjustable" in comparison to the X-Mark Pro which has an external adjustment?