Nominal vs Smart?

As the title askes, what are you using? I’ve mostly used smart over the past year or so, very nice cuts, no problems except for occasional beveling and maybe dross, but usually cure either with speed or amperage adjustments. Now I would like to dive into just getting those perfect as possible cuts more consistently. I feel as the nominal vs smart is a fork in the road? Do you use both? Do you have a preference? Lets hear it, I have searched and founds bits here and there in other posts, but nothing extensive. I have the Pro with a Cut60, love them both!