Infiduino UNO r3 is a clone of the Arduino Uno R3, with a few changes/enhancements - it looks like they put a switch in to change the operating voltage - but it's basically an Uno. The Uno is normally recommended as a good first Arduino for someone to get.
There are a huge number of clone Arduinos - some of them give themselves a name, and promote how they're better than the official one, or at least equally good (infidiuno is one of those), others don't have their own brand name and are just competing on price (for example, search ebay for Arduino).