From Wikipedia: The differences between Swiss French and Parisian French are minor and mostly lexical: a Swiss French speaker would have no trouble understanding a French speaker, while a French speaker would encounter only a few unfamiliar words while listening to a Swiss French speaker. Swiss French, when compared with French of France, has a somewhat "sing-song" effect. Swiss French differs from the French of France to a far lesser extent than Swiss German differs from standard German. This was not always the case, as most of the dialects spoken in the Romandie died out and thus are no longer spoken or used. There is not a single standardized Swiss French language: different cantons (or even different towns in some cases) will use different vocabulary, often derived from the local regional language or from German, since Switzerland is predominantly German-speaking. Many Standard French terms are used in certain cantons such as Geneva due to their proximity to the French border.

From Wikipedia: Unlike most regional languages in modern Europe, Swiss German is the spoken everyday language of all social levels in industrial cities, as well as in the countryside. Using dialect conveys neither social nor educational inferiority and is done with pride.[1] There are only a few specific settings where speaking Standard German is demanded or polite, e.g., in education (but not during breaks in school lessons, where the teachers will speak in dialect with students), in multilingual parliaments (the federal parliaments and a few cantonal and municipal ones), in the main news broadcast or in the presence of German-speaking foreigners. This situation has been called a "medial diglossia", since the spoken language is mainly the dialect, whereas the written language is mainly Standard German. Swiss German is intelligible to speakers of other Alemannic dialects, but poses greater difficulty in total comprehension to speakers of Standard German, including French- or Italian-speaking Swiss who learn Standard German at school. Swiss German speakers on TV or in movies are thus usually dubbed or subtitled if shown in Germany.

What you mean is, "I WONDER what is the differenc?". The verb 'to wander' means like, to roam, to travel (sort of, although implying a kind of aimlessness). Here's an example, "He's basically just been wandering around the country for the past four years". This sentence implies a lack of direction and focus in this individual. Another example, "I like to wander around central park on the weekend", again, implies a lack of planning and purpose and direction, although in this instance there is not a negative implication. Your title is wrong also. It should be, "Swiss German vs. the German spoken in Germany". "Swiss German vs. German German" sound a little awkward to me.

The German in Switzerland is a heavy dialect you cannot understand. Nevertheless you should not worry about this. The Swiss can speak standard German (Hochdeutsch) too, almost always.