In 2015 when we bought our 2300/Chevy chassis, the Ford chassis version was built on an E350 chassis and the Chevy version was on an Express 4500 chassis. This gave the Chevy nearly 2000 pounds more GVWR than the Ford. That's why we bought the Chevy version.
Looking at the FR website, I see that the 2350LE seems to have replaced the 2300. The floor plan appears unchanged, but GVWR has swapped, with the Ford version now having the higher rating. I have to assume that they are using an Chevy Express 3500 and Ford E450 now.
I'm just going by what I see on the website. Maybe someone else has more info on this.
2016 Sunseeker 2300C
"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts." - Bertrand Russell