It\'s kinda wrong that you go and ask wich is better, because there are many types of Uzis and you mentioned only one of them.
IIRC, there are 5 diffrent types of Uzis, each suiting for a diffrent purpose.
MP5 is a weapon designed for tactical operations in closed places. The Uzi you showed, however, is for semi-closed places (i.e. not open fields and such, where M16s are used, but suits for urban areas). With it\'s small length and superior range of fire, this specific Uzi is better than an MP5. However, in corridors and small rooms where range is not a problem, MP5 is better than this Uzi as there\'s a higher chance of hitting the target with it\'s higher rpm and accuaracy before it hides behind the wall.
And better in what way? In the desert? Both will be as useless as using your fists. In inter-galactic warfare perhaps?
Or what is cooler to hand on your wall? In this case I\'ll say Uzi, but that might just be a sudden patriotic burst.
Even if you\'re asking \'just generally\', you have to tell us in what category, or we might think you want us to tell you wich is better as a gardening tool (MP5), or wich is better for using to crack a rock (and then you have to say what kind of rock (this Uzi is better at breaking a flint, but MP5 is better at breaking a limestone). You should also show two items that are as similar as possible, and considering that there are various types of Uzis, you should choose the one that is the most similar to MP5.