I'm not a weight lifter who knows 'snatch' or an engineer who knows weight displacement. I'm just someone who has lifted objects out of the water. I would not argue that if the AB320 were full of water (instead of SLF, crew, baggage and air) on dry land it would weigh as much or more than a AB380.
However it is floating; and that means it is buoyant - equating to zero weight. But it is full of water; and thus it could not be hoisted (snatched) from the water by any device. Instead it must be s-l-o-w-l-y raised inch/cm-by-inch/cm, or as rapidly as the hoist can handle the weight, to allow the water to drain from the aircraft.
None of the few posts I have made on this board have involved speculation, so I will wait to see what happens.