If you already have VCF or BCF, then BCFtools may be better, and it even has a publication specifically for its ROH capabilities:
- BCFtools/RoH: a hidden Markov model approach for detecting autozygosity from next-generation sequencing data
If you use PLINK, then you will have to first convert your data to PLINK format.
That said, PLINK has a more broad set of functions for filtering and QC of genetics data, so, would be a good choice.
My ultimate recommendation for you is to try both.
PS - take a look here at these, too: