Both Markiplier and PewDiePie are great in their respective ways. I love Markiplier, especially when you consider his unique way with which he makes sensationalized commentary on video games. I also love his ability to yell, cry, scream in a way that will make you laugh. I believe Markiplier is way better compared to Pewdiepie, especially when you consider their different ways of making video game commentary. Markiplier's will always motivate you to the point that you might start thinking of creating a YouTube channel.
He also cares about his followers; he spends his money on charity works compared to Pewdiepie. I have heard and read different comments about how people wake up every morning with a very strong longing to see Markiplier's videos. However, I also prefer Pewdiepie to Markiplier whenever I want to crack my ribs; I always find Pewdiepie very funny. The good thing about the two is that they are not in any form of rivalry.