Personally, I think that the kind of internship or activities you've done outside of the academic curriculum will point you to a specific programme, and hence, it's not so much about competitiveness but rather the fit to the specific programme. The activities that I have undertaken, for example, reminds me why I am choosing Mdev - because of my interest in the development sector.
I have been following this website and thinking of applying since my second year in university, and now I'm in my fourth and final year, so I'm really looking forward to joining the institution, and will be pretty heart-broken if I don't get in.
Anyone who is not applying straight from the university, and has already been working for a few year?