Head to head
Fujifilm Pro 400H vs Fujifilm Acros II
Both carry the Fuji name, both have a devoted following, and both got discontinued and then changed status enough to make people anxious about stock. That shared anxiety is part of why they end up in the same conversation. The real difference is the obvious one once you say it out loud: Pro 400H gives you color, Acros II gives you black and white. Everything else flows from that.
How they differ
Pro 400H is a 400-speed color negative built around skin tones and gentle highlight handling, with that slightly cool, airy palette wedding and portrait shooters chased for years. It is fast enough for overcast days and indoor window light, it overexposes gracefully, and it scans clean. The catch is supply. Fuji discontinued it, so what you find is old stock at painful prices, and once it is gone it is gone. Acros II is the opposite story on availability: it is a current product, ISO 100, fine grained to the point of looking almost grainless in medium format, with deep blacks and a long smooth tonal range.
Choose Fujifilm Pro 400H
Pick Pro 400H if you specifically want its color look, the soft pastel skin rendering and forgiving highlights, and you shoot people, weddings, or editorial where that palette is the whole point. You also need to accept paying collector prices for a discontinued film and stockpiling while you can.
Full Fujifilm Pro 400H guide →Choose Fujifilm Acros II
Pick Acros II if you want black and white, the slowest clean grain you can practically get, and a film you can actually buy at a normal price today. It rewards tripods, landscapes, architecture, and any situation where you control the light and want maximum detail and tonal smoothness in the print.
Full Fujifilm Acros II guide →The verdict
This is not really a coin flip, because color versus black and white decides it. If you need Pro 400H's exact pastel color you will pay for it and ration it. If you are open to monochrome, Acros II is the saner long-term choice: cheaper, still made, and beautiful in its own right.