When I see someone bought a new car, I will pray “I hope his car is useful and he can benefit from it, I hope that someday I will have a car like his or even better”.
While it might be hard in practice, so far it helped me stay positive to everyone.
Both could be translated as enviousness but have a slightly different meanings. While Missgunst is definitely negative and maybe even destructive, Neid does not need to be negative and can have the meaning like in the example you gave.
In Swedish, envy is green (grön av avund), but jealousy is black (svartsjuk).
English has "emulous", mentioned upthread, and also "admiration" and "inspiration".
Example: do you wish you had a beautiful, new, fast car like your acquaintance; or do you wish they had an accident and lost their car (and/or got injured while in it)?
Helmut Schoeck wrote a great treatise on the subject of Envy. [1]