an interesting question – why Yaakov was worried about Esav’s Zionism and not Efron’s. Several ideas:
1) Yaakov is the person who worries about his zechuyos often, Avraham did not so much. R Twersky connects this with low self-esteem in a different place (Midrash that Yaakov was offered a chance to go up the ladder, but did not).
2) We have here an issue of who is inheriting. Not Efron. Esav has zechuyos as part of his claim.
3) Yaakov is afraid of encountering Esav. It is just about comparing with him. Efron could be a tzadik gamur but he is not coming to confront Yaakov.