Cardinal Danneels is definitely the most liberal of the group, and would represent a sharp break with Pope John Paul II's legacy IMHO. I think his routine presence on such lists is more media wishful thinking than anything else. Cardinal Ratzinger is probably the most conservative by far, but maybe considered too old.
Several of those on the graphic seem too old. The ones in their late 70s, unless this is to be an interim sort of Pontiff, would probably not work.
It will probably be a dark horse.
I heard talk on tv yesterday of a secret Chinese Cardinal.
Should be very interesting to see what transpires in the next few weeks.