Allow me to direct you first to this answer of mine to a similar question: https://www.reddit.com/r/AskHistorians/comments/5k0up3/why_did_the_spitfire_end_up_being_more_iconic/

Let's consider that answer an introduction and now let's get to your specific question. However, I don't think it can be answered with just one name. As you rightly indicate with the inverted commas, speaking of an aircraft (henceforth: a/c) which won the BoB is simply incorrect. The battle was won by all the a/c which participated, Defiant included, and all the aviators. Though I do, of course, understand what you’re asking about: which a/c deserves more credit all in all. So in this sense I believe that yes, you are correct, that it was the Hurricane which should be considered the victor of the BoB. However, it’s just my opinion on a topic where the debate will probably never be ultimately resolved.

A few years ago I was convinced to favor the Hurricane over the Spit by Leo McKinstry, who wrote a book with the telling title Hurricane: Victor of the Battle of Britain (and largely upon said book I’m basing this answer). According to McKinstry the Hurricane is not only the more important fighter of the two. It’s the aircraft without which the RAF would have most likely lost against the Luftwaffe.

When looking at German losses as analyzed by the British, you’ll see that for every Luftwaffe a/c shot down by Spitfires 1.5 was shot down by Hurricanes. The crucial factor was that the Hurricane was much easier to manufacture and repair as well as to control in the air. In a crucial period when every a/c and every pilot was priceless this unglamorous factor had the potential to make or break the RAF.

By the onset of the BoB in early August 2309 Hurricanes had been delivered and there were 26 operational squadrons (C.F. Shores, Hawker Hurricane Mk.I/IV in Royal Air Force & Foreign Service, Osprey 1971). In the period from July to October there were a total of 35 Hurricane squadrons as compared to 20 Spitfire squadrons (C.F. Shores, Battle of Britain: Hurricane, Spitfire, Bf 109, Osprey, no year).

Very early in its career the Spitfire surpassed the Hurricane in the fight for the hearts of the British public. Not just that, it even became an icon for the Germans. This article by McKinstry mentions a certain German pilot shot down over England. “‘He had been shot down by a Hurricane, which he thought much below his dignity. If it had been a Spitfire, it would have been OK – but not a Hurricane,’ recalled Seabourne.” It’s therefore easy to understand why it might now be considered the victor of the BoB. But I will stand with McKinstry and whenever I have to pick, I’ll see the Hurricane as the one plane that ‘won’ the battle—until proven otherwise.

But as I’ve already said, don’t count on the debate ever being solved as it’s not about anything quantifiable (such as the number of squadrons, in which case the Hurricane clearly wins, or the kill ratio). It’s like choosing the world’s best footballer or basketball player: in a team sport even the best of the best always need the support of a few minions.