Leaving aside all of Napoleon's practical achievements, I'm going to focus briefly on the world of difference in how he and Hitler were popularly perceived.

Despite his ultimate defeat at Waterloo, Napoleon was immediately the subject of a pretty impressive cottage memorabilia industry. In a manner that we'd associate with pop stars, his image could soon be found on almost anything, such as cameos, clocks, medals, wallpaper, knives, handkerchiefs, etc. Despite being illegal, such merchandise was smuggled in from Germany and proved highly popular in France. (My favourite story is the popular reports of a hen who laid an egg bearing the Emperor's face - the hen was arrested by the authorities.)

This fuelled, or was the product of, a continuing association by many in France with Bonaparte. Rumours of his return regularly set off local tremors throughout the 1820s and his name remained a lightening rod for agitation. Despite occasional purges and repression, the ideal of Bonapartism (admittedly, not entirely the same as Bonaparte in practice) remained popular in many areas. Indeed, it ultimately outlived the Restoration and delivered Louis Napoleon to power.

Even outside France his image was powerful. He obviously impressed Hegel, while any prominent figure with an ego could imagine himself as the new Napoleon. For example, Santa Anna of Mexico (the 'Napoleon of the West') was an avid collector of Napoleonic memorabilia.

In short, for decades after his death Napoleon continued to command the admiration and affection of millions in France. His image, if not the content of his actual policies while in power, endured and remained a powerful political current for the better part of a century. Actually, I don't really think I need to go into how markedly this differs from Hitler's ideological/popular legacy.

See Sudhir Hazareesingh's The Legend of Napoleon for a review of how the Napoleonic cult survived and adopted to the fall of its originator.

There are two major influences that Napoleon has left on France/Europe/the World, the first is his Napoleonic Code. The Napoleonic code is the first fully secular legal code that was implemented on a wide level. While the Revolution did implement legal code that was secular, the Napoleonic Code (introduced during his time as First Consul), was implemented throughout Europe due to the defeat of his enemies and the creation of buffer states that existed to protect France. From here, most modern European legal codes have ancestory to the Napoleonic code.

The most important thing that Napoleon had an influence wasn't directly made by him but was a result of him. The Nation-state was a relatively new idea before the Revolution and mainly existed in the US, Britain, and France. Before many "nations" were identified by their crown, but after the Napoleonic Wars, many kingdoms were tied together by a resistance against the French. The Prussians has the Wars of Liberation, the Russians had the Great Patriotic War, the Austrians had a small amount of patriotism but generally the Austrian Emperor was afraid of touching on nationalist ideology.

Nationalism will slowly come to a point when it helps bring about major reforms in most of Europe during the Revolutions of 1848, and it would continue to be a major defining part of Europe well into the 20th century.

However, if anything I think this is the major difference between the two. David G. Chandler, in his iconic book The Campaigns of Napoleon mentioned how after WW2, Napoleon suffered a loss in popularity due to being compared to "another corporal." He combats this to mention that Napoleon had a lasting legacy in the creation of national identities that endure to this day (he was writing in the 70s) but that Hitler's legacy was that of death and destruction. "Nothing is more insulting to the former (Napoleon) and more flattering to the latter (Hitler)."