This comic was almost certainly Italian and its author had a very Italian name, similar to "Ivo Milazzo", an excellent author of a western comic called Ken Parker. But I'm sure it's not Ivo Milazzo. The drawing style was elegant but quite childish and whimsy.
It might be too early to fit this comic into the steampunk genre, but it was set in the 19th century and the protagonists travelled in a sphere similar to the one propelled by HG Wells' "cavorite", but in this case the spaceship was propelled by steam and the travellers had to throw coal into the boilers using shovels. It's impossible to be more steampunk than that.
When they arrived on Mars they were involved in a war between two Martian kingdoms and achieved peace by teaching the Martians to play football (soccer) to settle their differences.