I'm really far from an expert on this, but I've read quite a lot on the subject and my understanding is that there is considerably more historical evidence for

I'm really far from an expert on this, but I've read quite a lot on the subject and my understanding is that there is considerably more historical evidence for Gautama-the-Buddha being a single real person than for Jesus Christ, that "we can't even nail him down to a specific century" notwithstanding. In the case of Jesus the timing isn't much of a question because of the well-accounted for political events of the time, whereas perhaps India at the time lacked sufficiently standard date-keeping system for us to synchronize the writings now. But as I understand it the Buddha is mentioned in a lot of completely independent contemporaneous texts whereas Jesus is basically only mentioned only in the Bible. In itself that doesn't prove anything... the Buddha was active as a spiritual leader for many decades, and Jesus only for 3 years, and maybe the wider society around Jesus was just much more interested in political events whereas Indian society as a whole at the time of Buddha was exploring more spiritual and philosophical dimensions. But I've always had the impression that there are proportionally more history scholars who question the existence of Jesus as a single real person than that of the Buddha.