What are the differences between the margins of the lateral and medial condyles of the tibia?
The proximal end of the tibia is broad and flat known as tibial plateau. The intercondylar region crosses through the midline of this plateau, separating the medial and lateral condyles of the tibia. 

The two condyles are in form of flat and broad surface for articulation with the medial and lateral condyles. The medial surface  is convex and subcutaneous. The lateral surface, also known as articular surface is smooth surface and somewhat concave, and articulates with the talus.

[Sources:
https://www.physio-pedia.com/Tibia
http://en.wikipedia.org/w/index.php?title=Medial_malleolus&amp;oldid=240146811
http://www.bartleby.com/107/61.html ]