If I would update Snow Leopard to Mavericks, would I have this?

Hello, everybody!

As I got no real experience comments from people who updated Mac OS from Snow Leopard to Mavericks on a MacBook White Unibody, on this discussion, now I'm trying to be more concise, and ask you for more specific questions on the matter.

So, if I would updated to Mavericks, Would I have…?

• VoiceOver Voices in different languages, as they come from factory since Lion, or stayed just with the English ones I have now?
• Full Screen capability of all apps at the same time? Now, it's like my PC has only one "Full Screen", so, when you open one app on Full Screen, all the others go to windows.
• The newest versions of iLife, iWork, Photo Booth, Stickies…? Now, I have Garage Band 6.0.5, iPhoto 9.2.3, iMovie 9.0.4; iWork 9.1, Photo Booth 3.0.3, Stickies 7.0
• iChat, iWeb, iDVD, Front Row, X11… as I have now, or would them be erased or changed for other apps? Or I would not be capable for running them, as the Power PC apps I have and can run now?
• Chess app in Spanish too, as it comes from factory since Lion, or it still remains only in English, as now?
• Spanish dictionary on Disctionary app? Now I only have English and Tesaurus on my Mac, and the capability of searching on wikipedia on internet from the app?
• Timer Coalescing, App Nap, Compressed Memory, GateKeeper, app's sandboxing, Automatic Versions… or any of those is not allowed on my MacBook White unibody?
• The ability to see the complete miniature windows opened on the same desk as easy as sliding up four fingers on the trackpad (as I can see now the ones opened on the same "Space")?
• To update my RAM? Now I have 2 Gb, and I saw it is exactly the requirment of Mavericks. I'm not sure which was the requirement of Snow Leopard, which actually runs pretty fine.

This is enough now for helping me to take or not the decission. Thank you all.