If the marbles are identical, the volume is the same. If you want, you can use different units and it looks like the volume is different.

They are identical in volume: 1mL = 1cc

Identical objects should have the same volume. Unless they only look identical but are made of different material or made up of some other compound that could cause it to have a different volume. For example, two small Starbucks cups would hold the same amount of water. The only time it wouldn't is if there are ice cubes, or something else in the cup that takes up space.

Neither is. They're identical volumes.

The liquid has the same mass but less volume than the ice.