The difference is seen in the way that the animals speak and interact, as the general moral animals seem to speak their minds clearly, while the wicked animals on the farm, such as Napoleon, twist language in such a way that it meets their insidious desires.
ðə dˈɪfɹəns ɪz sˈiːn ɪnðə wˈeɪ ðætðɪ ˈænɪməlz spˈiːk ænd ˌɪntɚɹˈækt, æz ðə dʒˈɛnɚɹəl mˈɔːɹəl ˈænɪməlz sˈiːm tə spˈiːk ðɛɹ mˈaɪndz klˈɪɹli, wˌaɪl ðə wˈɪkᵻd ˈænɪməlz ɔnðə fˈɑːɹm, sˈʌtʃ ɐz nɐpˈoʊlɪən, twˈɪst lˈæŋɡwɪdʒ ɪn sˈʌtʃ ɐ wˈeɪ ðˌɐɾɪt mˈiːts ðɛɹ ɪnsˈɪdiəs dɪzˈaɪɚz.