Again, precise battery testing is difficult. Are you using the same battery in the same conditional state, are the batteries new, are they used, making the cameras as similar as reasonably possible with regard to the active modes they're in, turning the energy settings off, etc. Are you going to just let them sit for an extended period of time or try to shoot a bunch with them, and then, can you easily shoot exactly the same, and ... yada yada yada.
So, just a quick test today, I just turned as much energy savings off as I could, had both in Electronic Shutter Mode, turned them on and left them. I was way too busy today to do a bunch of shooting with them. Now the battery on the right I did not have percent on, but I noticed even though both batteries were showing charged fully on the Hasselblad Dual Charger, that the battery for the CFV 100c when inserted showed 96%. The battery for the CFV 50c showed full, but I didn't have the percentage turned on. I have to consider they were likely pretty close.
At any rate, at 2:30 pm, I started my test. At 6:20pm, the CFV 100c showed 80% remaining, the CFV 50c showed 72% remaining. Now it's possible, but not likely, that the fully charged battery in the CFV 50c started out less capacity than the 96% of the CFV 100c battery, but I doubt that. Also, these are used batteries, they could be at different "life strengths". But if anything, I would have to - pleasingly and surprisingly - presume at this point that the battery performance of the CFV 100c is no worse, and potentially slightly better than the CFV 50c.
Oh, did I mention that - unlike almost everywhere else, even BH, even HassyDirect - we actually have these in stock, on our shelf?
https://digitalback.com/collections/hasselblad-v-system/products/hasselblad-907x-cfv-100c
Steve Hendrix/CI