A projection that is better at showing the comparative difference in length between going through the Suez canal vs going around.
The mercator makes Africa look comparatively small on the y-axis which is a problem if you are trying to visualise the size of Africa and the time it takes to go around the continent.
If i visually compare the distance on the mercator and an equal area projection is looks to make the trip about 20% shorter on mercator (compared to the apparent visual distance going through Suez). Non of the projections will be 100% accurate but the mercator is less accurate for this specific case.