Similarity: Involved employing supporters to office
Henry Clay supported John Quincy Adams during the 1824 election; in return, John Quincy Adams made Henry Clay Secretary of State after defeating Andrew Jackson for the presidency.
During his presidency, Andrew Jackson gave office jobs exclusively to his democratic supporters.
Difference: Not much difference, but the Corrupt Bargain happened during and after an election while the spoils system was developed during Jackson's presidency.
According to Shirer, the war in Europe was delayed by allowing Germany to take over Czechoslovakia. The rest of the Europe felt satisfied because the war would not take place.