While I can see the argument that they're back office bullshit, Executive Orders, etc. have some similarities. That said, there are stark differences.
Bush started two wars, Obama is winding them down.
Bush's fiscal irresponsibility created a depression, Obama has worked to slowly restore the economy.
Bush opened Guantanamo Bay, Obama is working to close it.
Bush pushed for DOMA, Obama is working to overturn it.
Bush made the world hate Americans, Obama has done a lot to restore our standing abroad.
Bush tried to kill Bin Laden, Obama did.
Obama has given us the Healthcare Reform, the Lilly Ledbetter Act, help save the American auto industry, and ended don't ask don't tell, etc.