Well, the E425 costs a bit more than the i500.
Remember the i500 is based on an upgraded E463 (launched 2018)
Plus you're comparing the i500 (launched in 2019) to a much more recent 2022 PSRe425 (which itself share the same chipset as the PSRe473, also 2022).
The next i5xx (i510?) will be based on the 473, and *then* you'll get all the Indian styles already in EW425plus the i500 content.
You can't compare an older model, based on the E463 (launched 2018, so based on a 5.5 year old keyboard)) and wonder why the 2022 model has more content. (both based on the same 'level of sound chip),
Mark