The fingerprint is comprised of more than device and OS:
Browser type and version
Screen resolution
Installed fonts
Browser plugins and extensions
Canvas fingerprinting data
WebGL (graphics hardware info)
Time zone
Language settings
IP address
HTTP headers
Touch support
Device type
AudioContext
QuantumNomad_
Yeah but several of those will also be the same if you have the same iPhone model and iOS. Safari browser updates are installed as part of iOS update. So anyone with the same iOS version has the same version of Safari.
Browser type and version
Screen resolution
Installed fonts
Browser plugins and extensions
Canvas fingerprinting data
WebGL (graphics hardware info)
Time zone
Language settings
IP address
HTTP headers
Touch support
Device type
AudioContext