programming languages these days are like fighting disciplines: karate, judo, taekwondo, kung-fudge you, jiujutsu, etc
when compared or fought between each other, it's the one who master his chosen field the most wins.

i suggest you try both, also others, not just C/C++/C#, and see which you like the most.

i liked c++ than others before. but i ended up not using it on my job (databases)