I think it would be poetic justice if in a triumph of naturalism we actually cloned him and got only boring copies because the real Ramanujan actually got his insights supernaturally, like he claimed...
There might be additional factors like mitochondrial DNA or some epigenetic factors or some accident during development of his brain. Getting 1000 boring Ramanujan clones would prove that the our skill is lacking not that we couldn't replicate a goddess.