Megilah1: 5
אֵין בֵּין יוֹם טוֹב לְשַׁבָּת אֶלָּא אֹכֶל נֶפֶשׁ בִּלְבָד.  אֵין בֵּין שַׁבָּת לְיוֹם הַכִּפּוּרִים אֶלָּא שֶׁזֶּה זְדוֹנוֹ בִידֵי אָדָם וְזֶה זְדוֹנוֹ בְכָרֵת.
There is no difference between [the laws applying to] a holiday and [those applying to] Sabbath except [in laws pertaining to] food.  There is no difference between [the laws applying to] Sabbath and [those applying to] Yom Kippur except that the deliberate desecration of one is punishable by man, but the deliberate desecration of the other is punishable by kares.
Megilah1: 6
אֵין בֵּין הַמֻּדָּר הֲנָאָה מֵחֲבֵרוֹ לַמֻּדָּר מִמֶּנּוּ מַאֲכָל אֶלָּא דְּרִיסַת הָרֶגֶל וְכֵלִים שֶׁאֵין עוֹשִׂין בָּהֶן אֹכֶל נֶפֶשׁ.  אֵין בֵּין נְדָרִים לִנְדָבוֹת אֶלָּא שֶׁהַנְּדָרִים חַיָּב בְּאַחֲרָיוּתָן וּנְדָבוֹת אֵינוֹ חַיָּב בְּאַחֲרָיוּתָן.
There is no difference between one forbidden by vow to have any benefit from someone else and one forbidden by vow to receive food from him, except for setting foot [on his property] and utensils with which people do not prepare food.  There is no difference between vow-offerings and gift-offerings except that concerning vows one is responsible for their security, but concerning gifts one is not responsible for their security.