I would suggest waiting for actual reviews then. Rumoured specs could very well match the actual release specs, or they may be a bit different, but neither are real world results. Since you’re talking about making decisions on actual products, I think it would be a mistake to choose the 16 series 5X just because of paper specs, considering that 5X camera is 2 years old now, as it made its debut in 2023 with the 15 Pro Max. The rumoured 3.5X for the 17 Pro series is supposed to get not only 48 MP, but also a larger sensor size.
I wouldn’t be surprised if the results from a 7X zoom option could actually be quite reasonable in comparison to the older 5X, at least in daytime lighting. Remember, the 5X quality in the 16 Pro isn’t actually rated that well compared to the prior 3X in the 15 Pro, and the 5X is also criticized for making portrait shots more awkward.