Pay Protection of LDA in Secretariat Cadre

My date of joining 25.04.2005 as L.D.A. in Secretariat . Another’s date of joining 25.09.2005 as Typist. On 12.12. 2008 the Typist is L.D.A. in Secretariat Cadre. He is junior to me as per date of joining at the post of Typist and L.D.A both. He is U.D.A after getting C.A.S. benefit . But I become U.D.A without availing C.A.S benefit.So the said junior U.D.A. is drawing more pay amounting Rs 320 in basic than me. In this case, am I eligible to get Pay Protection in respect of said junior U.D.A. ?