FWIW, have no knowledge of those brands. "Generically," you should determine what you will want to power and determine the wattage you'll require. As these are light duty units, running at or near max wattage for an extended period will lead to early failure. e.g. If you determine you'll have a 1,000 watt steady state load, look at 1500-2000W. Also, note that most gensets talk about "12 hour runtime per tank of gas at half load" Factor that in if you're carrying extra fuel. As with any small engine purchase is reputable service available locally? Not a camper, but not sure why the interest in inverter gensets other than they tend to be quieter in operation. Talk to other campers and see what they like and why and factor into your plans.