Well, it seems there will be some major differences between the Wii and X-box/PS3 versions, because of the hard drive. Take a look at this, from
www.sonic-hq.net forums, posted by SonicV2.
Also this mentions a hedgehog engine, it is supposed to be a brand new engine for the Sonic series, that supposedly does wonders for it, yeah...
What ever it is, us Wii owners don't get it for what ever reason.
"Info from the Play Magazine interview:
~This game (Wii version) won't use the hedgehog engine for the wii version, say engine will only be for the high end console.
~Designers are working as hard as the can to make the wii version identical to the Xbox/version Graphicaly.
~The wii version isn't the main version but it isn't a port eather. (<----- WTF?)
~The wii version isn't been developed by the same people as the xbox version, it is developed by Dimps ( I mean just the stage design, the team is working together)
~ This game will have town levels, you will be able to talk to people. (<---YAYZ)
~Upgrades are get by getting items in the action stages like in sonic adventure 2, includes Wall jumping etc..
~The music is been developed by the Same music director as the one in Sonic rush.
~The music change when you are using the Sonic boost.
~ The development thing is completely different than the one they have been using in, its full of Young gifted people with a passion and lot to prove. (<---- In other words, new meat. Let's see if they know what to do)
~ The wii stages will be completely different than the xbox/ps3 stages. they will have the same themes but will be differently because of the lack of a huge Hard drive on the wii. So even if you have both version you will enjoy something different. (<---- Finally. Buying the same game on two different consoles won't be considered weird )
~To keep the action flowing, you can play as much as you want the actions stages, after you complete them the first time, they won't be any more requirements.
~They will try to use the hedgehog engine to good use, and keep the loading times to a absolute minimum, if any loading at all.
~There's a twist involving eggman en which he will do something so evil, nobody would see it coming, the he will then meet something he fear more than life itself and that will control him, his mother. (<---- This one was considered a joke though. Damnit, I wanna see the woman who gave birth to him!)
~2 new levels were show.
1- was a Paris-like city full of stores and looking lively.
2- Was a concept are of a antique Japanese village, with Dojos and Cascades.
~The story completely revolts about sonic.
~The Lead designer things it will be a cool idea to Release Sonic 06 with just action levels for less loading at a budget price. (<---- In other words, Sonic 06 without the beastality story)"
There you have it. I don't mind the stages being layed out differently but I hope its not at the cost of the games over all fun.