Approval is easier -- just replace "Vote for one candidate" with "Vote for one or more candidates," and Condorcet using the same ranked ballot as IRV, but doesn't end up with some of the illogical results. Here is a website that shows graphically the difference between the methods, as well as Plurality (elects extremes, squeezes out the center) and Borda (expands the middle when candidates to the left and right are added): http://zesty.ca/voting/sim/