I am new to painting and in the process of learning. I would like to know what advantages and disadvantages Krita and Corel Painter have. If you have used both of these Software and finished a painting using them, what are your positive and negative views on each Software? I am only a beginner, so I cannot compare the two apart from preferring the Krita's user interface.
I am more familiar with Corel Painter than with Krita, but I will give it a shot
This is an obvious one for a lot of people. Corel Painter Essentials costs about $40 minimum. Getting the latest annual version of Corel Painter will set you back around $200, and the upgrades are about $99. Krita is free.
Similarly, brush packs for Corel Painter retail for about $30 each (and are generally not available for Essentials). I don't know if there's a corresponding version of sold Krita brushes. Both programs have many people giving brushes away for free and (outside of Painter Essentials), you generally have the ability to build any brush you might buy as long as you learn how to adjust brush parameters.
This is where the Corel Painter lines pull ahead in my opinion. While the gap is narrowing, Corel Painter is still probably one of the best pieces of software for replicating the look of traditional artwork. Their Thick Paint, Real Oil, and Real Watercolor brushes look and act like traditional media. As best I can tell, the Krita brushes act more like regular digital art brushes with a few small tweaks.
I am honestly not certain how the Krita and Corel Painter particle brushes compare, although a fair amount of the premium brush packs from Corel Painter are variations on particle brushes that do some pretty amazing things. The default brushes are a bit more underwhelming, although again, you can replicate all of the premium brushes with the right tweaks.
I have yet to see Krita crash when I was using it. Corel Painter has some persistent issues with application stability, with a running joke being that, much like Star Trek movies, the even-numbered ones are better.
If you have a lot of spare cash, or can get a good deal (they apparently sell pretty cheap educational copies for students, and Humble Bundle has offered it at a great discount twice), Corel Painter is probably slightly superior overall. However, it does come at a premium.