In the US in particular.

There was a bunch of reporting in the past few days that a Federal District Court in Pennsylvania found that Fifth Amendment rights apply to smartphone passcodes.

Random link: http://www.digitaltrends.com/mobile/why-the-government-cant-...

That same protection doesn't seem to apply to fingerprints. Random link: http://time.com/3558936/fingerprint-password-fifth-amendment...

Again, I'm not a lawyer, but that seems to be how the law falls out on that issue.

Whether that's an issue for you, personally - no idea. It might be a factor for some.