Unveiled Mods

Good morning Exiles...
Quick question. Unveiling mods, the ones it shows when you are having Jun show you them on a unveiled item.. why are they always more powerful on the original item, then are less so in the crafting bench?
Examples: in the field, I unveil a pair of boots.. one of the mods shows 30% increased movement and 100% chance to avoid being chilled. But in the bench it is only 18-20% increased movement.
Another is 39% increased damage during any flask event, but reduced to 24-28% on the bench. Just a couple of examples here, but they all seem to do this.

Don't get me wrong, I am expecting this to be a, "Yea, that's just the way it is" scenario, but maybe I am missing something? Fingers crossed, lol.

Thanks in advance...
Cheers

if you want to craft the full power veiled mod, you have to use a veiled orb. Crafting bench is a lower tier.