Can you hook two different kinds of generators together?

smkettner wrote:
Never read a post of connecting different brands.

Here's one: Paralleled Honda and Kipor post
There have been a lot of Honda inverter generator "facts" promoted on the forum that have proven to be false. Some offhand examples:
1) Connecting one of the AC output wires to chassis ground will burn out the generator. (i.e. "neutral-ground bond").
2) Can't parallel different wattage eu-series generators.
3) Can't parallel more than 2 generators.
4) Can't parallel generators without additional synchronization apparatus.

There are outstanding assertions that can't be proven or disproven because they need volumes of long-term data we probably won't ever have:
1) Running air conditioner from eu2000i will burn out the air conditioner.
2) Running air conditioner from the eu2000i will burn out the generator.
3) Running a generator near its rated load will shorten its life.

I'm not encouraging experimentation without the full acceptance that the risk is totally with whoever does it. I do encourage being careful to separate opinion from actual experience or established fact.