I replaced our Norwood 1200 series with a Samsung 18 cu ft residential. Same weight, same width, but higher than the rv fridge. I think the wider model you have will mean more modification of the cavity space. The first thing that needs looking at is what happens when the kitchen slide is in. How much space do you have from the front of the fridge enclosure to an island? Residential fridges will have doors and handles that stick out to 29 inches plus. If your enclosures opening from the rearmost wall approx 34 inches towards the front clears the island, then the 18 cu ft Samsung will fit in. I have not regretted the work I needed to do to install the residential fridge.
2012 F350 6.7 L dually, 2013 3800RE with 6 pt leveling, Sumitomo 17.5" load range h tires, Samsung 18 cu ft residential fridge, 8k Morryde I.S. with disc brakes. Full timing since 2012.