I do believe the stove top pressure cooker is faster than the electric ones.
For example, I put a roast in and it took almost 2 hours before it was tender. The book said something like 25 minutes. I took it out and it was still bloody inside. For a pot roast!
I could do that in my stovetop pressure cooker in 30 minutes or so.
Modern pressure cookers are so foolproof, they are very safe and yes, you do have to adjust the burner to keep the jiggle at the right tempo, but there isn't much to that.
One thing I've found that the Instant Pot is great at is, of all things, risotto. No more stirring for 30 minutes. I was impressed. And I'm a chef!
I think the Instant Pot definitely has its place but the stove top pressure cooker can still be useful, too.
Watson