Śrī Caitanya Caritamrta · Text Madhya 9.146
সিদ্ধান্ততস্ত্বভেদেঽপি শ্রীশ-কৃষ্ণস্বরূপয়োঃ ।
রসেনোৎকৃষ্যতে কৃষ্ণরূপমেষা রসস্থিতিঃ ॥ ১৪৬ ॥
siddhāntatas tv abhede ’pi
śrīśa-kṛṣṇa-svarūpayoḥ
rasenotkṛṣyate kṛṣṇa-
rūpam eṣā rasa-sthitiḥ
“ ‘According to transcendental realization, there is no difference between the forms of Kṛṣṇa and Nārāyaṇa. Yet in Kṛṣṇa there is a special transcendental attraction due to the conjugal mellow, and consequently He surpasses Nārāyaṇa. This is the conclusion of transcendental mellows.’
Read Śrīla Prabhupāda's purport on Vedabase.io