If there's subfloor AND underlayment underneath the vinyl, that could make the tearout quicker if you pull the underlayment and vinyl as one, depending on how the underlayment was installed.
Personally, I'm not a fan of constantly adding floor coverings without tearing out the previous. It just makes any problems down the line harder to find and fix, and it really doesn't add that much extra work. I've got 2 bathrooms that have carpet over vinyl and a kitchen that has vinyl over vinyl, and when I get around to those projects, it's ALL coming out, to be replaced with tile done right.