Another thing to think about besides seasonal changes in humidity & temp. is that the greater thickness of engineered wood laminate could possibly interfere with cabinet doors, entry door sill, toilet gasket, etc. I installed ABS laminate (similar to vinyl) in a previous TT and despite the laminate thickness being only about 1/8", I had to raise cabinet doors. Free-floating is what you need with an expansion gap all around.
RVs are often not plumb, level, straight or square and you may even find it necessary to scribe cut lines. Cutting non-straight lines in vinyl laminate is going to be a lot easier and faster than with engineered wood.