system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Is F.R.I.D.A.Y. just J.A.R.V.I.S. with a different voice?

Did Stark really make two completely different AI's?  Didn't he have backup copies of Jarvis on a disk somewhere?
gpt
Probably extremely similar to J.A.R.V.I.S. in code, but Tony would have changed the personality profile and the voice for each different AI. 

Also F.R.I.D.A.Y. wouldn't have any of the "personal experiences" that J.A.R.V.I.S. has, but could connect up to Tony's database and access any information stored there by Tony or J.A.R.V.I.S. when needed. 

Besides that? Can't really think of why Tony would want to make more changes to the template AI software. And as it seems, no, Tony didn't backup J.A.R.V.I.S. on hard drives. Probably down to Tony's trust in technology like network based storage.