In numerous instances across different Purānas and Itihāsas, we can find that Maha Vishnu and Parameshwara are contemporaries who complement each other and support each other in various forms. Through the various incidents, the common message that is conveyed to the humankind to assimilate is that there is absolutely no difference between the 2 supreme powers.
Manavas should transcend the barriers of ignorance that identifies differences between them and aspire to reach the state of equanimity where one worships both supreme powers with equal devotion and fervour.
This article tries to capture some specific instances where Shiva and Vishnu in his Krishna avatar had some close encounters. These interactions have some interesting answers that we aspire for and provide a much better perspective of the perceived differences or rather the lack of the same.