I'm a Browning guy - but OneOunce is right - if one fits you, the other one probably will not fit you. Your key issue here is Fit - not how they look - and you need to know the drop at comb, drop at heel, length of pull etc that fits you - or they both may be a mistake for you. Shotguns do not come in one size fits all .......
I'm also not a big Cynergy model fan / most of my guns are from the Citori model lineup - and while I think the jury is still out on the longevity of the Cynergy lockup system, it seems to be doing just fine.
As you probably realize, there are a lot of models of the Cynergy out there ( 17 in the current catalog ) / and in the 686 too ..... If you can, shoot similar models and see if they fit / take them to a patterning board if you can / you can't tell by shooting targets.
I'm also not a big Cynergy model fan / most of my guns are from the Citori model lineup - and while I think the jury is still out on the longevity of the Cynergy lockup system, it seems to be doing just fine.
As you probably realize, there are a lot of models of the Cynergy out there ( 17 in the current catalog ) / and in the 686 too ..... If you can, shoot similar models and see if they fit / take them to a patterning board if you can / you can't tell by shooting targets.