A HUD home is titled very much the same as a car and a BOCA is not.

A HUD homes is built on a steal frame with axles and a BOCA is not.

A HUD home is constructed with 3/8 inch drywall panels with no mud work and all seems are covered with a strip and a BOCA is constructed with 1/2 inch drywall and mudded the same as a stick built home.

HUD homes are plumbed with cheap plastic tubes and BOCA homes are plumbed with copper pipes or whatever is required by the local building code.

A BOCA home has a higher pitched roof and some are two story homes such as a Cape Cod style home.

When you walk into a HUD home it is very obvious that you are in a HUD home but a BOCA is not so apparent and you would need to look in the basement or crawl space to inspect the framing of the floor to confirm it is a BOCA and not a stick built home.

BOCA stands for Building Officials and Code Administrators.

The BOCA standard is a minimum by which all stick built or site built home builders must comply.

Many banks will not finance HUD homes but most banks will finance a BOCA home.