The material used for the waterproof/breathable 'Moisture Vapour Permeable' (MVP) layer/membrane for both the Air Force Rainsuit (jacket & trousers) and the 'Converged Rainsuit (jacket & trousers) is not Gore-Tex, or any sort of 'generic' PTFE (polytetrafluoroethylene), but rather is a porous polyurethane (PU) coating done by a company called Stedfast (www.stedfast.com).
The pros of using a PU vs. a PTFE fabric is that PU has much higher durability in terms of POL/DEET contamination resistance (the pores being blocked/saturated) than a PTFE fabric. The cons of using a PU vs. a PTFE fabric is that PU's breathability (ability to pass moisture vapour) is significantly lower than PTFE, meaning you're more likely to get wet/clammy from a buildup of perspiration condenstation when wearing a PU garment. Also, PU fabrics tend to be cheaper to laminate/coat than PTFE, which the government also weighs its consideration upon.