VOB, Video Object is a container format from a DVD disc in the VIDEEO_TS folder. It belongs to a kind of DVD video format with MPEG-2 Stream.

AVI is a multimedia container format introduced by Microsoft in November 1992 as part of its Video for Windows technology.

1: AVI does have some of the advanced capabilities that are available in VOB.
2: AVI is a container format with the DV compressor type being only one of possible compressors.
3: AVI files can contain both audio and video data in a file container. While VOB can contain video, audio, subtitle, menu and navigation contents multiplexed together.

Other Comparison: MOV vs WMV / 3GP vs 3G2 / MP4 vs FLV / MKV vs MP4 / MP4 vs MP3 / 3GP vs MOV / 3GP vs FLV / M2TS vs MP4

Related Post of VOB File formats

Related Post of AVI File formats