Nein. Leistung ist nicht spürbar schneller, display ist auch nicht besser. Wenn der bisherige speicher dir genügt, bleibt nur noch die frage der kamera und der wasserdichtheit. Ist dir dies der preis wert? Ich selbst überspringe immer 2bis3 generationen/flaggschiffe/jahre
Showroom simply means that this product is on display in one of the many Digitec stores which can be tested and viewed. The product you actually buy will be straight out of the storage, sealed and unopened, new in the box.
Products that once are no longer displayed, maybe for a newer model or whatever reason, will be sold here aswell but will have the tag "Refurbished" or "Demo Product". Those usually have some discount and are clearly marked as such by availability aswell with just 1 piece at storage, so its unique for each article. For example like this product: Sony Xperia X Compact (4.6", 32GB, 23MP, Universe Black)
Yes it should work. I tried mine with about 3 different SIMs all Swiss and they all worked. Even one that I had trimmed down from a full-sized SIM with a pair of toenail scissors (I washed the scissors first).