I do the same. I play live with a powerhead and use a real 2x12 cabinet with G12T-75 and one with V30s. I find that Merged and DI profiles sound best with real cabinets but do use some Studio ones also, Cab Off option enabled. I also have a 1x12 cab with a F12-X200 FRFR speaker, when I use that one I turn on the Cabs obviously. Its just VERY different, you certainly have more tonal options with the FRFR (in your case it would be the Kabinet) because you can literally change the characteristics of any profile being used by changing Cabs/IRs. I like both options honestly as its nice to have options. But I do prefer the real cabinet for rehearsal and live use.
BTW...If you do go with a Kabinet or any FRFR speaker, you will be shockingly surprised on how different the same profile you have been using with a real cabinet sound in an FRFR. I tend to create two profiles settings with the same profile, one for a real cabinet and one for an FRFR. I also have a Headrush powered FRFR, yet again...a totally different tone from the same exact profile.