This page explains how to state simple comparisons, but doesn't address how to ask about more complex comparisons.
For instance, what's the right Mandarin equivalent of the English question structure: "Do you like A more than B?"
1) Do you like Chinese food more than Japanese food?
2) Do you like planes more than trains?
How do you deal with the verb?
Do you duplicate it like this: 妳喜歡中國菜比喜歡日本菜多嗎？
Is there a "cleaner", more concise grammatical form where you don't duplicate the verb? For instance, could you do this: 妳喜歡中國菜比日本菜多嗎？