Really, it is probably more a matter of how well you shoot and what you use for your field shooting positions and how good (steady, consistent) your shots are that determines any meaningful difference between the smooth bore and the rifled. That you can shoot the rifled bore slightly more accurately off a shooting bench does not mean that you will do so in the field so....any meaningful difference between the smooth bore and rifled in all reality may mean all but nothing. If you test your accuracy targeting (shooting from)your probable type of field shooting positions, this will tell you more than anything else. We spend a lot of time talking accuracy between the two barrel types but reality is, that both are as often as not, very similar in terms of just how well you can hit what you are shooting at, in the general area you are trying to hit. I own three fast twist rifled barrel guns and five smooth bores and it's more a matter of a slightly improved trajectory with the sabot rounds vs the Brenneke type load, than anything else but again, the vast majority of the time, the differences haven't really matter much in the field.
One thing to remember that you get with the smooth bore is versatility......way more. The cost of the sabot rounds is quite a bit more on the whole ....AND I can use buckshot for home defense and Wally World bird shot ....to practice. So, the cost of running a smoothbore, and the fun factor absolutely goes..... to the smooth bore.
And the four Benelli's (three Nova's and a M1 Super 90) I have are all smooth bores which shoot slugs great, buckshot great, and birdshot by the bucket. three of my Benelli's are tactically oriented and one, is actually a dedicated bird gun for Turkey and what not.
Paul