4000 watt Generator with A/C vs 1500 watt Gen without A/C???

I have a Honda I2000 Companion that I use when going to races. On my small 30ft 5th wheel it will run everything but my AC when cord is on the 30amp plug. When the coffee maker is on it will come off of idle and then if microwave is used it really revs up so if you plan to run a couple things at once I definitely would go with the bigger gen. I have an onboard 4000w onan but the Honda is just so much more efficient when I don't need the AC.