The Aussies are looking at a submarine replacement for their Collins-class boats that will be about twice the displacement and around 90 meters in length. Range should be as good as the Collins-class or improved. The Japanese Soryu-class falls short in range behind the Collins-class, Type 216, or Barracuda-class boats.
AIP, while being a force multiplier, complicates logistics and raises life-cycle costs as a sub effectively has 2 propulsion systems. I’d argue the real coming revolution is lithium ion batteries, which Japan is investing in and all the other contenders are working on. You get higher endurance with a shorter logistics footprint.
While the Soryu may have the least range, it’s the lowest risk option as both Euro designs are still concepts with neither having built a conventional boat of that size.