The DEXA scan and BOD POD test are both body composition assessments that measure a person's total fat mass versus non-fat mass.
The DEXA will report fat mass versus non-fat mass, both in total and segmentally, as well as your total bone mineral density. Some DEXA scans also provide a Visceral Adipose Tissue (VAT) reading as well.
The BOD POD will report total fat mass and non-fat mass.