The Lord (Visnu) was actually more favorable to Vrtrasura because after being killed by Indra's thunderbolt, Vrtrasura would go back to Godhead, whereas the victorious Indra would rot in this material world: Revision history
Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.