Soldato
From my limited experience with Kies (not my primary handset sorry) it just overwrites the OS data and keeps installed apps as long as you do the official upgrade path. The default directory for appdata is the internal card and isn't wiped during Kies upgrades.
I offer no warranty on this claim, if kies wipes the lot then the next time you go into market you'll be prompted to download everything again (DO IT - IT WILL FORGET NEXT TIME YOU OPEN MARKET), gameloft have a CS dept who will re-send you the APKs if needed. A lot of people recommend wiping between major versions of Android but I'd probably only do so if I encountered a lot of force-closes.
I offer no warranty on this claim, if kies wipes the lot then the next time you go into market you'll be prompted to download everything again (DO IT - IT WILL FORGET NEXT TIME YOU OPEN MARKET), gameloft have a CS dept who will re-send you the APKs if needed. A lot of people recommend wiping between major versions of Android but I'd probably only do so if I encountered a lot of force-closes.