Tiger -- although the numbers seem incredibly small --- 3 degrees or 3.25 --- there is a very noticeable/appreciable difference in the approach picture between 3 and 4 degrees. Enormous. I know --- it doesn't sound like there could be -- but there is.
By the way -- the Vasi/papi/ILS systems are all calculated to give you obstacle clearance on the approach if you follow them. There are no promises about engine failure performance. I would just repeat my earlyier comment that the most important thing a beginning pilot (experienced ones to) is to fly stablised, i.e., controlled/consistent approaches. For every engine failure on final accident I'll bet there are a thousand caused by too steep an approach -- or by too shallow an approach --- or by full power off -- then full power on --- wheel barrowing, etc. from people who weren't flying a stabilised approach. Talk to your instructor about it.
I think I have beat this subject to death --- and I can see I am definitely in the minority on this board --- so I'll shut up now. May you never run out of airspeed, altitude and ideas all at the same time!