i think its here cos its a melbourne specific question...although yeah i can see where you're coming from.
well, look at it this way...people say sydney uni is better at engineering because they have higher UAI cutoffs. but the fact of the matter is that their faculty accepts less school leavers, thereby promoting competition. An extreme example if this case is with the aeronautical engineering course, which accepts only 20 or so students. Also, the engineering faculty is perceived to be better at USyd just because of the institution's history and name value. I can tell you from first had experience, interviewing professors and open days that UNSW is just as good (in fact, I suspect better) than USyd. furthermore, advanced maths in USyd is harder to get into prely because of the aforementioned reason. You might think why the hell is this guy blabbing on about irrelevant stuff. You see, Melbourne medicine students do need really high ENTER scores (equivalent to UAI), even if they do get in thru the 100pc UMAT stream. Although the number of local students there is the same as monash, the name value is mightily better, i can assure you.
As for your question (finally!), I can't tell you for sure where to do medicine because each uni have their own empases. Melb Uni is somewhat more traditional and based on textbook learning and lectures. Monash doesn't do 'real' medicine until uch later on in first year as we beat around the bush doing interpersonal communication, holisitic healing, stress management kinda stuff. Another contrast is that Melb medicine does the clinical skills and communication/legal/ethical assessments separately, whereas everything in monash is integrated.
Monash has a 5 year course whereas melb has a 6 year course as it is compulsory for them to combine their degree with arts or medical science, so it could be argued that melb med students experience a more well rounded degree. if you really, want, you could take an intermission in fourth year and produce a thesis to gain the award of BMedSci.
Finally, one major peeve i have with my uni is that its in the middle of nowhere and far away from the city, whereas Melb Uni is just around the corner from lygon street. so i guess itd be ore convenient for you to study at melb uni. the flipside is that you can study better in clayton cos there are less distractions and the living costs are cheaper.
ultimatey, the decision is up to you and trust me, once you are doing the round in hospitals it's not the uni which depends what kind of practitioner you are, but how well you try and succeed in relation to your peers...