The former is just following a script and wants your information in a specific format because that's what the automation demands.

The latter is a person who you will either work with or under, they don't care.

The latter is the preferable path in my opinion, and personally use the "send me your resume in a specific format" request as a reason to cease contact because of all it implies.

Makes no sense to maintain manually written resume when you are already maintaining your employment and experience history on LinkedIn.

All the relevant data is in their database, just click the export to pdf button, if somebody insists on PDF, and attach that to the email.