darag,
That's one way of looking at it. But its probably unreasonable to assume zero growth (why invest in such a fund). In reality if you assume a gross 6% p.a. growth (on average) over the term, then initial units will deliver 1.25% (6% less 4.75%) whilst accumulation units will deliver 5.25% (6% less 0.75%).
On this basis both values will grow, but the initial unit value will just grow much more slowly.