Difference between Normal Testing and UAT Testing

System testing:

It is based on SRS(Software Requirement Specification)

It is 100% black box testing.

It is done by testers in the organization.

Defects can be corrected here.

All possible dummy inputs are checked.

UAT:

It is based on the business scenario.

It is done by the clients.

If defects are found they are said as failure product.

Random inputs are checked.