1)Tattooine=Arrakis.
A dirt ball in the Back end of Nowhere for its entire life and existance VS the Seat of an Empire and the producer of a product everyone must have?
The only thing they share between them is sand...
2)Vaporators=Dew precipitators
Thats how one gets water out of the air, Guess the ones in real life are a rip off of dune as well eh?
3)Kessel Spice=Melange. Without the EU, what are we to think of that?
Lets see a otherwise harmless photoactive substance produced deep underground by ENERGY SPIDERS?! VS A Dangerious Substance that must be consumed for a lifetime or die and in certian people gives them vison abilitys
4)Stormtroopers=Saudakar. Soldier fanatics of the Emperor by any other name....
The Saudakar are not Clones of Jango Fett are they?

Nor do they drop Lasguns at first opertiunity and go Hand to Hand oh and they wear effective armor(Damn Stormy armor with Dune style shielding? They would be untoucable)
5)Spice smugglers=Spice smugglers.
Guess 12th Century Spice Smugglers where a rip off of Dune as well and don't forget all those fakers during the 3rd Century in China
All stolen from Dune I tells ya!
1)Luke Skywalker and Paul Atreides. One is a farmboy, the other's a scion of nobility, but, they're both youngsters of destiny and martial arts prowess.
Luke? Paaa it was not until the Emperor reborn trained him he was acutal a good swordsman, he was fighting a stiff in a suit, Samual could have taken Vadar apart in a sword fight in under eight seconds not to mention Maul!(God he would have kick Luke's ass so easily)
2)The Jedi and the Bene Gesserit. They're both ancient schools dedicated to keeping peace in their respective galaxies. The Jedi are pro-active, the BG are arbitrators.
Pah agian! Bene Gesserit are master planers, the Jedi are bumbling Judges(Towards the End anyway, before they where just smart Judges)
Thats not even similar, If you want somthing similar Try the Second Foundationers
3)Swordsmanship features prominently in both sagas.
To a point...
4)Fremen and Tusken Raiders. If you just go by verbal descrptions, the TR costumes could make a more convincing robed Fremen in stillsuit than has been portrayed in the actual Dune films.
The Tuskens however do not live in Cave Warriens they live on the Sands 24/7 and are not human(Nor are they good fighters)
5)The Galactic Empire of Palpatine and the Empire of the Padishahs. While in Children of Dune the Empire is described as "multi galactic" with a population of "mega-trillions", I'm sure you see my point.
Palpatine's Empire truely WAS an Empire not the Padishah's kinda Empire that was FOREVER at the measry of the Guild Navagators and was not even strongly settled
6)Time scale. Both Empires are approximately 25,000 years old.
Acutal the SW Empires are even older, 25k Marks the Fall since Xim the Despot the last of the Despot Rules, An unknow period before the Galaxy was united under tryannical rulers