Firstly, Batiste. I have only used the original, so I can only give my opinion on that. I'd love to try the others in their range, but it's the only one available in my rural area.
So, you spray it on, massage it in and comb it out. Simples! The smell of Batiste Original isn't the best and it's quite noticeable I find. It lingers too. Then you have the white powdery spray that turns your hair white. This is fine so long as you remember to brush your hair well afterwards! As much as I'm not keen on the smell, it does work! Ideal if I'm rushing off for the school run.
Aussie dry shampoo is much the same. Spray on, massage and comb out. The smell (as with all Aussie products) is divine! And to my surprise....no white powdery stuff on my hair! Yay! However, that's as far as this product goes for me. It didn't make much difference to my hair, and left a sticky stiff residue, which didn't comb out. This surprised me, because as I said I am a HUGE Aussie fan and their products are usually fantastic!
So there we have it...I'll be sticking with Batiste but will continue to use the Aussie wet shampoo and conditioner as they're so luxurious!