The main difference is that Brita's products seem to remove minerals from water while making it slightly more acidic. Our filter adds electrolytes, anti-oxidants, minerals and alkalinity!
The Phox V2 features the first refillable cartridge. We built our cartridge to last the life of the jug, not just 30 days. The water filtration granules expire after 45 days, simply open the filter, clean out and pour in the new refill pack.