This just makes the mod aware of Krastorio2 so that the atomic robots are no longer slower than the non-atomic counterparts when Krastorio2 is present. (It applies the same changes Krastorio2 makes to the non-atomic bots)
On the other hand, if you don't mind them being a bit slower, they are technically overall faster when traveling long distances since they never have to make any recharging pit stops. Essentially, if using Krastorio2, use the boost if you actually want them to be the same speed, or the non-boost version if you don't mind them having less cargo carrying capacity and speed. If Krastorio2 is not in your mods list, then it doesn't matter which of the two you use.
