Your software is very substandard. Below I'll explain why and give you an example of how it should be done.
Side sense: side sense on the xperia 10 and 10 plus are different from xperia 1. Are they not the Sony phones of 2019? Well the xperia 1 version could do split app from side sense while the others not. I stopped using side sense because of this.
Battery care: just the settings page for battery care is different xperia 1 has graph while the others don't have. It's just explanation really and if you say not enough space isn't xperia 10 the same size?
Example of a company with good software. Fujifilm, the revamped version. They are doing well and have a growing fan base to this brand. I bought both the x20 and x10 camera. X20 has better hardware and software than x10. The best part was x10 had updated firmware with some features added from x20 when x20 was released. Software is meant to be given, see Fujifilm, Apple, Microsoft (learned from Apple). This makes your hard ware strong and differentiates you. Remember not differentiate between models but between brands.
