It is not about whether one platform is actually better in battle; it’s about which generates more kickbacks because it has a bigger line in the budget.
War is a business and the more things cost the better off for the brass.
What would you want to do if it were your budget? Get a new toy along with all the accessories and increase your budget 10, 20, 100x as well as your organization size, or just keep ordering spare parts and maintain a product you already have?