Off topic:What is the difference between .csi indexing vs .tbi indexing

Question

[ThePlaintiff]

Hi, I am generating bcf files from vcf. When indexing using bcftools the default indiexing is .csi however I also have tabix (generates .tbi index files) installed on my system hence I can opt for either. I'd just like to have a brief comparison between the two indexing formats in order to know which one to choose.

Thank you,