Hare Kṛṣṇa,
Brs. 1.2.297-298: The elements of kāmānuga will be described: That rāgānuga-sādhana-bhakti which is filled with longing and which follows after the kāma-rūpa-rāgātmika-bhakti of the siddha-bhaktas, is called kāmānuga-bhakti. There are two types: sambhogecchā-mayī and tad-tad-bhāvecchātmā.
Brs. 299: Sambhogecchā-mayī-bhakti is characterized by enjoying conjugally with Kṛṣṇa. Tad-bhāvecchātmika-bhakti is characterized by desiring the sweet mood of love of the kāma-rūpa-siddha devotees.
Brs. 300: Those who develop longing for the bhāva of the gopīs after seeing the sweetness in the deity of Kṛṣṇa and the gopīs, or after hearing about His pastimes with the gopīs, are qualified for sādhana of either of these types of kāmānuga-bhakti. In the Padma Purāṇa, it is said that even men can attain this bhakti.
Brs. 301-302: Examples of males becoming gopīs are as follows: Previously, all the sages living in Daṇḍakāraṇya forest, who after seeing Lord Rāma, desired enjoyment with His form, attained forms of women and appeared in Gokula. Attaining the Lord by that kāma, they became liberated from the ocean of the material world.
Brs. 303: A person who serves on the path of vaidhi-bhakti with a desire for a conjugal relationship with the Lord and a high position, but without desire for the gopis’ type of love, after some time becomes a queen in Dvārakā.
Below is a table showing the comparison between Sambhogecchā-mayī and Tad-tad-bhāvecchātmā.
In essence, sambhogecchā-mayī is oriented toward direct participation in conjugal pastimes, while tad-tad-bhāvecchātmā is oriented toward immersion in the inner emotional world of a specific gopī — a subtler, more selfless, and therefore higher aspiration. Sambhogecchā-mayī devotees want to be with Kṛṣṇa and give Him pleasure directly, while tad-tad-bhāvecchātmā devotees want to witness and taste the sweetness of Rādhā and Kṛṣṇa’s relationship — a more removed but arguably deeper form of love.
All glories to Śrīla Prabhupāda!
Krsna Katha 