TechPowerUp posted a review on the Antec P20C
A quote from the article:
The Antec P20C uses the same bones as the DP503, clocking in at a similar price but aiming to offer a cleaner look without the use of RGB and a focus on quieter fans. While it may not offer the same bang for your buck as the ARGB capable DP503, it gives you a good option if understated is what you are looking for.Antec P20C Review