Poland's big problem is Goal Differential.
Assuming Costa Rica beats Ecuador by 1, that means Poland must beat Costa Rica by two or more goals.
Then Germany would have to beat Ecuador by at least 3 goals for the Poles to get in.
For the US, they must beat Italy, then beat Ghana, then hope the Italians don't beat the Czechs.
For scenario for Poland seems a little more feasible than for the US.
Costarica wont win, they will lose, Ecuador is a decent team.
For scenario for Poland seems a little more feasible than for the US.
Depends on what you mean by "feasible". If you're talking in terms of "destiny in one's own hands", the US has a more feasible way of going through than Poland.
The US must beat two teams, regardless of what score they must beat them by, and in addition the result of two evenly matched teams (Italy-Czech) turns out to be a draw or win for the Czechs (which is highly likely). No talk of goal difference at all, plus the USA controls at least 2/3 of what they need to accomplish.
Contrast this to Poland, where they must win *and* win by 2 goals, and hope Germany wins *and* wins by 3 goals.
If the USA's first game was an anomaly and not the norm, I'd rather have the USA's scenario than Poland's.