0w-20 was chosen to comply with emissions. Besides that less problems with intake solenoid valve after switching to 0w-20. Characteristics of 0w-20 and 5w-30 assuming both are synthetic are in favor of 0w-20. Low temp starts are also in favor of 0w-20. So switching to 0w-20 will definitely be beneficial.

The other thing is how much oil sump can store so comparing micras engine with versas(2021-22) one can see versa is taking almost 0.5L more oil thats why oil change interval is doubled from 8k to 15k. Which means even though engine model is same, version is different. Which means they are not exactly same engines.