How does the military Thrift Savings Plan $($TSP$)$ differ from the uniformed service retirement plan?

The military Thrift Savings Plan is a defined benefit plan, whereas the uniformed service retirement plan is a defined contribution plan.

The military Thrift Savings Plan is a defined contribution plan, whereas the uniformed service retirement plan is a defined benefit plan.

Retirement benefits under the Thrift Savings Plan are tax$-$exempt, whereas retirement benefits under the uniformed service retirement plan are partially taxable.

Retirement benefits under the Thrift Savings Plan are based on the servicemember's rank at retirement, whereas retirement benefits under the uniformed service retirement plan are based on the servicemember's contributions to the plan and earnings on the contributions.