Unos llevan la fama y otros cardan la lana

Unos llevan la fama y otros cardan la lana
 

It means that some people have a bad-reputation for sth, however, some other with no bad reputation are worse than those who have bad-reputation.:rose:

I'd just say,
some do all the work and others get all the credit
Some people do all the work, and others take all the credit

I also heard it like this,
unos cardan la lana y otros cobran la fama
uno siembra, y otro recoge.

In Catalonian you have, Uns alcen la caça i altres la maten
[There are the guys go get game in the out and there are other ones who kill it]

One man sows and the other reaps.
Some sows, other mows.
Some do the sowing, others the reaping.

Then, something a bit different, (I think the above answers your question already)
Something like "to set a herring to catch a whale"
Who ever caught anything with a naked hook?
Venture a small fish and catch a big one...

Y cuando se trata de algo negativo , ej los X tiene fama de chorizos, pero roban mas los Y.

Uy, qué despiste, no me di cuenta de lo que decías...
Lo cierto es que normalmente es en el sentido "positivo", pero en "negativo" sería algo como,

The X-guys get all the blame, but others [the Y-guys] are getting away with exactly the same thing (or worse).
Or,
The X-guys get the reputation of small-time crook (or punk, if you will), but the Y-guys are stealing even more...

Not totally sure if there is a specific idiom in English... but I would express it as I noted above.

Some guys have all the luck. Some guys have all the pain.

It's the same the whole world over....