Why the 686 over, say...a 686P or this 620?



Model: 620
Caliber: .357MAG/.38+P
Capacity: 7 Rounds
Barrel Length: 4"
Front Sight: Red Ramp Front
Rear Sight: White Outline Adjustable Rear
Grip: Rubber Grips
Frame: Medium
Finish: Satin Stainless
Overall Length: 9 1/2"
Material: Stainless Steel
Weight Empty: 37.9 oz.