Every element in the periodic table is different in many ways.
Every element has a different atomic number.Further, they differ in their physical properties.
Some are metals, some non-metals and some metalloids.
Some exist in solid state, some liquid and some gaseous.
Some are hard whereas some are soft. Some are quite abundant whereas some are extremely rare.
So, it can be said that they very much different.
They are classified and ordered by there differnt atomic number, which is equal to their (different) proton numbers.