That different explanation in the Bible means that the teachings about Satan in Baha'i are different to the Bible's teachings about Satan. It is not that the same thing is taught in different ways.
In Baha'i Baha'u'llah cannot have been led astray by a demon appearing to him or even by Satan himself, and that is because Satan does not exist as a being who deceives people.
In the Bible
2Coronthians 11:13 For such men are false apostles, deceitful workers, masquerading as apostles of Christ. 14
And no wonder, for Satan himself masquerades as an angel of light. 15 It is not surprising, then, if his servants masquerade as servants of righteousness.