This will always be an issue when discussing altcoins, especially when people have their favorites on the list.
For me, i don't think the market cap value should be placed into high consideration. Because a coin with a low market cap can still perform better than the one on the top list.

I always see the real potent of a coin through what their worth or what they set up for. A good coin can suddenly jump from zero to from billions. So don't easily judge.