Upon the industrial disability retirement of a state miscellaneous member within Section 21151, or a state industrial member whose service is subject to Section 21076, the disability allowance shall be 50 percent of his or her final compensation plus an annuity purchased with his or her accumulated additional contribution, if any, or if qualified for service retirement, he or she shall receive his or her service retirement allowance, if the allowance, after deducting the annuity, is greater.