What are the differences between Oleg’s and Igor’s treaties with Byzantium?

The essence of the difference between the treaties of Oleg and Igor with Byzantium lies in the political and strategic situation itself. When Prince Oleg in 907 set out on a campaign against Byzantium, having under his command a huge army (80 thousand people) and 2,000 ships, he could actually deal a crushing blow to the empire. Byzantium understood what it threatened and offered a big tribute and a very lucrative contract. At that moment, when Igor went to Byzantium in 941-944, his campaign was not successful. In this connection, a new treaty was signed between Russia and Byzantium, but it was less profitable than the previous one.