Answer:
One is a question and the other is a prediction.
Explanation:
A quantitative research is based on numbers and data.
A research hypothesis is a prediction or an explanation that will be proven right or wrong given the results found in the research. And the quantitative research question is a question that will define the porpuse and will guide what we want to get out of the investigation.
Thus, the characteristic that distinguishes them is:
One is a question and the other is a prediction.
Where the question is the quantitative research question and the prediction is the research hypothesis.