A couple of years ago, Ford has a side-by-side picture comparison of their fuel filter against a competitor. Of course, the Motorcraft was much better than the other brand that they cut up. I don't recall that they mentioned the brand. It could have been a cheap Chinese filter. Enough to make a difference? It probably depends on the environment that the filter lived in. I will also say that I took a factory fuel filter off a '95 Ford last year only because the owner had never changed it and it has rusted through and leaked. FWIW, I have several vehicles that don't have a factory fuel filter and they run fine.