Perazzi built their reputation as a competition shotgun maker, mostly for Olympic shooting sports, and the drop out trigger design was done to allow a competitor to change or repair a trigger group or trigger spring in a matter of minutes and be able to continue using the same gun and not have to have a back-up gun or to borrow a friends gun.
They charge more for them and it's questionable as to weather you need the capability to change your trigger group, while in a competition, but most Perazzi loyalist prefer the drop out trigger group guns, myself included, even though I've never had to use my spare trigger group during a shoot.
Fixed trigger guns are usually a little lighter, but not enough to make any real difference. It's the ability to keep on shooting during a competition that is the real reason for the drop out trigger option or design.
As to Zoli or Perazzi that is like asking if you would like to drive a Fiat or a Ferarri. Nothing wrong with the Fiat but that Ferarri is such a nice handling machine and so well made how could you not want to drive one, at least once in your life. JMO
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