http://www.simge.edu.sg/idc/groups/ge_partner_uni_rmit/documents/ge_brochure/idcpub003088.pdf (refer to pg 6, 13 and 22)
actually wont really affect, and wont lose out. cos all the full prog and advanced 1 students (in fact all biz students) start by doing core biz modules (pg 6), same exposure and your gpa start from there. and both will do all the 8 acct majors (pg 13), acct foundations will be ACCT2060 and ACCT2062 (pg 13). only difference is full prog students can opt to do another 4 minors (the acct professional services minor on pg 22), or in fact they can choose to do another 8 modules from another major (not acct).
so if really wanna say lose out, you lose out on the 4 more acct modules they do (but i dunno whether are they useful, i didnt major in acct) or you can say you lose out on the another major exposure they get.
frankly speaking, once you start sch, you will be swarmed by all the projs, assignments and tests (and exams). never hear of ppl wanting to do more modules. and 1 more year of studies = 1 year working experience as well. but i suggest if u really wanna do the full prog, ask RMIT whether you can revert back to advanced 1 if you change your mind (after all you did get granted advanced 1). if they say ok, ask for black and white statement for future verification! and make up ur mind after sem 2 cos by sem 3, full prog and advanced 1 will be different and by then, you should have an idea of uni life liao.