The Gem. brings a proof that Talmud Torah is greater because Yaakov didn't get punished for the years he was learning. Perhaps they are equal?! And when two mitzvohs are equal then a person has a right to choose whichever he wants. (similar to a case where a mother has no obligation to be mechabed the father; and both ask for a glass of water; the son may choose to serve whoever he wants first.)
Kol Tuv
alex Lebovits, toronto, canada
Yakov already began Kibud Av by leaving for Charan and he wouldn't be allowed to "drop it" and start a new Mitzvah unless the second one was greater.
Mordecai Kornfeld