The P2S is the P-series at its best: 600 mm/s, enclosed, full AMS, $549. Its ceiling: single nozzle, passive chamber around 50C, 300C hotend, 256 mm. The H2D lifts all four ceilings: independent dual extrusion, 65C active chamber, 350C, 350 x 320 x 325 mm, plus LiDAR and the laser platform.
Most P2S owners never hit those ceilings. The H2D is for people who already know they will: soluble supports weekly, PA/PC regularly, parts bigger than 256 mm, or the 40W laser as second function.