[BioC] find overlaping genes in ENSEMBL gene ID list and NCBI gene ID list

[Biase, Fernando]

Hi everyone,

I have a list of ENSEMBL gene _IDS  and a list with NCBI gene_IDs. I need to find which  ids correspond to genes in both list (overlapping genes) and each genes are in each one of them but not present in the other list (non-overlapping genes).
Can anyone give me some advice on this task? Or indicate a material do read?
In case it is relevant, the organism is Bos taurus.

Thanks in advance,
Fernando