I use both and I prefer Cubase - but then neither is 100% perfect IMHO.
I’d like Cubase to allow me to grab a line like PT does, then drag that up and down (obviously this can be done by lassoing the blobs and moving those, but it’d be quicker if I could grab the line directly, maybe using a key modifier?).
And, even better, if I’m using the range tool and grab a line, how about automatically adding blobs at the boundaries so it only adjusts the volume within the range? That’d be great for adjusting a whole chorus quickly.
If you list some features that you’d like then there’s a chance that Steinberg pick up on them I think…