Stone fruits (plumbs, apricots, the two most common fruits in rakija) have higher methanol levels:
https://pdfs.semanticscholar.org/2e9c/544909602112c2816a956b...
https://pdfs.semanticscholar.org/2e9c/544909602112c2816a956b...
Nothing about more methanol in the heads either.
Your claims stand as unsupported.