So I was talking to Stranger and he suggested that I'd make The Strongest Sonic topic a bit broader, after thinking it over he's got a good point there, so same rules apply for those who want to talk about who the Strongest Sonic is, but now we can all point out the differences on which canon has so and so different, the way the characters are, locations, so on and so forth. Not only that but as an added bonus you guys can suggest which Fan Works can enter this discussion as well! So the fun will NEVER END. 
So with that said, here's the list of Offical Sonic Worlds that are up for disscusions, any fan series or other series that I might have missed make your suggestions, until then let's REALLY get this started!
Sega Sonic - The 1st World and home of The Sega Games, starring The Blue Blur himself. Needs no introductions. Definitely Earth, albeit different from ours.
Manga Sonic - The world of Nicky Hedgehog, when he wants to be strong Sonic Appears! With his family, friends, bully, and Eggman this is quite a unique world.
STC Sonic - The Mobius of The Hedgehog with An Attitude, a Jerk with a Heart of Gold (No, Really). An unusual Mobius unlike any other!
AoSTH Sonic - The Cartoony Mobius with a Trickster of a Hedgehog, follows the rules and has High Morals. The laws of physics do not apply, or sanity for that matter.
SatAM Sonic - The Mobius taken over by Robotnik, The Fastest Thing Alive and The Freedom Fighters do it to it! Quite popular around here, it's got a bit of a following.
Novel and Gamebook Sonic - Based off of The Novels by "Martin Adams" and Fantail's Adventure Gamebooks, there are many lost adventures within these books. Will their secrets ever be uncovered?
Archie Sonic - Similar to SatAM, Home of The Hero of Mobius, he means well. Changed quite a bit recently. Pre and Post Super Genesis Wave Mobius' excepted.
SU Sonic - A Mobius with Sonic as a Prince with Two Siblings, they form a band to play music, fight Robotnik, and find their mother. Yes, she will be found.
OVA Sonic - The Land of The Sky is home to a certain Blue Hedgehog, The Land of Darkness is home to Eggman. Quite a strange world isn't it?
SX Sonic - Two Known Dimensions, One that has Earth, The Other has Sonic's Unnamed World. Similar to Sega Sonic's but very different in it's own right. Also home to EL GRAN GORDO!!!!!
SB Sonic - Sonic Boom! A New Adventure, A New Sonic, what awaits us in this world?
List of Fan Series Worlds, because that way the fun never ends.
Sea3on - A continuation of SatAM, after Robotnik's defeat it seemed that freedom was at hand, but the fight has only just begun. Also quite popular around here! http://sonicsatam.com/sea3on/
STC-O - A continuation of STC, with Chaos defeated Sonic exiled himself only to return with less of an egocentric attitude, the fight goes on as Old and New foes appear, updates irregularly and with the blessing of some of the creators of STC it's Unofficially Official. Highly recommended. http://www.stconline.co.uk/
Netraptor Sonicverse - A Series of Fanfictions that originally started with an adaption of S3&K, it then took on a life of it's own taking in other Canons from Sonic The Hedgehog such as SatAM, along with other game adaptions and unique twists to the series it's very popular. http://www.netraptor....php?seriesid=1
Sonic Sketchy - A twisted, cynical take on The Sonic Series. Sonic escapes from his creators home in order to be free and free the people from their unknowing enslavement, is their a happy ending to this story? Discontinued, not really talked about, and hard to find. Luckily you guys have me to thank for finding this story's website. Interesting. For Mature Audiences Only. http://www.angelfire.../sketchyseries/
Seriously, HOW THE HELL did nobody know that Robotnik was evil!? I mean just look at those red, glowing, hellish eyes, oh yeah I can completely trust that guy with my life! *sarcasm*