BWT Bestmax M Replacement Cartridge

I ordered this filter by mistake not realizing I had been using the Premium.I've been using the BWT Bestmax Premium for a few years and been happy with its performance. It also has a mineralization feature for higher magnesium content that ensures optimum extraction results for coffee, which is what I use this for.However, my biggest surprise is that this regular filter only filters 642 liters of water at my hardness setting compared to the premium at 1,750 liters of water!!! And I can buy the premium for only a 14% higher price. That is just nuts. I won't make that mistake again.I am happy with the BWT filters but get the premium and skip the regular.