Both the Bhagavad-gita and Srimad-Bhagavatam are transcendental topics of Lord Krsna. The Gita is Krsna-katha, or topics of Krsna, because it is spoken by the Lord, and the Bhagavatam is also Krsna-katha because it is spoken about the Lord. Lord Sri Caitanya Mahaprabhu wanted everyone to be informed of both Krsna-kathas by His order.
Lord Krsna Caitanya is Krsna Himself in the garb of a devotee of Krsna, and therefore the versions of both Lord Krsna and SriKrsna Caitanya Mahaprahhu are identical. Lord Caitanya desired that all who are born in India seriously understand such Krsna-kathas and then after full realization preach the transcendental message to everyone in all parts of the world. That will bring about the desired peace and prosperity of the stricken world. SB 1.7.13-14
Lord Krsna Caitanya is Krsna Himself in the garb of a devotee of Krsna, and therefore the versions of both Lord Krsna and SriKrsna Caitanya Mahaprahhu are identical. Lord Caitanya desired that all who are born in India seriously understand such Krsna-kathas and then after full realization preach the transcendental message to everyone in all parts of the world. That will bring about the desired peace and prosperity of the stricken world. SB 1.7.13-14