Jets are a constant, repeatable diving device, not affected all that much by speed.
Inlines, depth control is a combination of weight/lineout/speed. With your speed being a large part of depth after the amount of line out and weight used. If that makes sense.
For me, I prefer inlines/bouncers. In larger wave conditions, the jets stay more at a constant depth where the inlines rise/fall in the water column with each surge. If done correctly, inlines/bouncers would be easier to use with a lot less line out. When running 5+ inline boards per side, less tangle chances using the inlilnes/bouncers than using jets.
I set up my own releases for my jets years ago that are very repeatable and easy to adjust. If your interested.