The best semi auto rifled slug shotgun for deer?

[CAESAR]

Price is not the highest priority right now. I care about long range, weight....
Does 20ga reach farther?

 

[Colt Delta Elite]

My 20ga dropped a lot less at 100 yds than a 12ga was my favorite slug gun for sure

 

[hqjig]

m2

 

[boilermaker]

Price is not the highest priority right now. I care about long range, weight....
Does 20ga reach farther?

My understanding is the range is essentially the same but the 12ga arrives with more energy at the destination.