For several year now I've been making the instant coffee (e.g. Nescafe) as follows: after putting a spoon of coffee I add boiling water just to cover the coffee and stir it with spoon or electrical stirrer. Only after this I fill up the mug and drink.
So my question is: what's the difference (if any) between this method and just filling up the mug with boiling water then stir and drink?