No semi-auto shotgun is spring operated.
"...what is the advantage..." Six of this, half dozen of the other. However, recoil operated shotguns, tend to be ammo sensitive. Gas operated shotguns can be too, but not as much.
They're all very big dollar shotguns. $1750ish for the Benelli. $1400ish for the Urika and $1900ish for the Xtrema. Plus taxes. $800ish will buy you a Remington 11-87.
Mind you, no semi-auto beats a Remington 870 pump for reliability. $508 will buy you one with a 26" smooth bore and a rifled 20" deer barrel. Epp's.