They are of the same shape and same dimensions. Other than that everything is different. They are made of different materials, have different mass, density, specific gravity, coefficient of friction, thermal conductivity, porosity, etc, etc. You name it and they are different.
volume
When their denominators are the same or different numbers.
similar to look the same but have a different size or measurement.
Then they are similar.
similar, same, indifferent,
no; they have the same volume but their mass is quite different; density is mass/volume and the sponge has much lower density
volume
Because they both absorb in the same way
Hexactinellida, Calcarea, Demospongiae, andSclerospongiaeTechnically, however, the Sclerospongiae are not considered sponges. They are very similar, but they are not the same. Like bats and birds who have both evolved the ability to fly but are not the same types of animals, Slerospongiae have evolved and became very similar to sponges, but they are not sponges.
sometimes
When their denominators are the same or different numbers.
same, alike, similar
similar to look the same but have a different size or measurement.
similar strongly suggestive of virtually (not literally) the same
YES
Similar figures are polygons with the same shape but a different size. eg: 5cm square compared to a 10cm square = similar figures. Same shape but different size.
I do not know what a "song shoot" is, but I will attempt to generically answer the second half of the question in regards to a brick compared to anything else. If a brick is thrown/fired/shot, it will have a different aerodynamic drag that anything that doesn't have the same shape. If a brick thrown/fired/shot with the same force as a lighter object, the brick will have a lower speed. If the speed of the two objects are the same, the brick required more force than the lighter object. If a brick thrown/fired/shot at the same angle as another object, the arch will be the same, as acceleration is independant of mass.