Arduino Vs. Raspberry Pi: Which Is The Right DIY Platform For You?
readwrite.com
readwrite.com
The comparison chart also seems to want to make Arduino look like something you would not want. It does not really reveal anything of meaning as these are two different machines.
In my opinion the definition, comparison should only mention that an Arduino is meant for real-time hardware-specific controlling/monitoring while a Pi is more like a small computer that has a possibility of controlling/monitoring a few hardware elements.