Autotech fuel pump kit

Hi everyone it’s been awhile hope everyone’s doing well. Looking into increasing fuel flow in the S4. I have two options inline hpfp or the auto tech fuel pump mod. Leaning towards the Auto tech solution because I’d rather not splice wires etc to achieve the objective. Has the kit been widely used enough that we can assume it’ll be safe for everyday driving and not cause any catastrophic circumstances if it fails. It is advertised that it increases fuel pressure by 10 Bar which 147psi. What would actually be the difference between the Auto tech kit and an inline auxiliary pump like a Walbro which is rated at 255lph in terms of fuel line pressure and fuel volume, is it one in the same or different way of delivering more fuel flow? Does anyone have suggestions, advice or want to educate me on the two options above. Any and all help is greatly appreciated.