Permanent filters can sometimes alter the taste of the coffee brewing, depending on the material used to make it. Paper filters, on the other hand, add a very unique flavor to the brew. The coffee ground is filtered more thoroughly through paper filters, leaving no residue. When it comes to eco-friendliness, the permanent filters are a better pick as they can be reused. Paper filters, though biodegradable, have to be disposed of after every use, increasing the effect of deforestation. Paper filters make the cleaning process easier than when using a permanent filter, and they also come cheaper.