It doesn't really work like that.
If Icom makes any changes to the model that affect the characteristics of its emissions, they have to go through the testing and type approval process again in every market in which they wish to sell that radio. That will cost a few hundred thousand dollars. All just to meet a silly Australian requirement for an extra 2dB of 5rd order intermod rejection or something similarly ridiculous.
Not really worth it just to sell 100 radios or so a year in Australia.