Having done both, unless you are at either end of your career (very beginning with no family etc, or very end with no family to support any longer) take the Airbus. When you get made redundant (and you will, at some stage, everyone does) it’s much easier to keep your career running with an Airbus rating.
My time in the left on light twins twins was great fun, learned a lot, scared myself and I think made me a better captain, but I’m not sure I’d recommend it as a long term option...