Do you realize you are comparing Zaino which is a sealer (technically synthetic wax) to most the others which are carnauba wax. I would take Klasse or P21S over Zaino any day of the week. I believe Zaino is way overpriced for the results...to each his own I guess.

 

Zaino is great if you want longevity. It is a pain to work with but i have not seen any other product last as long as zaino. I've gone 8 months between applications and it lasts that long for me. However, zaino does not produce the best look(this is subjective) If you don't mind waxing every month or have a garage queen, then use a product like p21s which is easy to work with, has a great shine, and last about 1 months or so. But if you don't have the time to continually wax, just use zaino, it will last a long time.
just my 2 cents

 

Or you could use your favorite sealant AND top it off with some nice carnauba wax