If your trying to say they are similar yet different I suppose that is true. It is one of those things where you say, "yeh they are not different yet in this you ______ & this you _____". For me, I think the keyword is control. In no gi the lack of it means you need to control your opponents arm better. In gi, the control is different, you can use their gi aswell as your own to apply pressure & execute techniques.
For those who don't know. Differences with grip are:
For head region: The back of the neck for no gi/ for gi you can use lapels
For mid section: Underhooke & overhooks seem more important with no gi/Lapels can be used again & also wrapping the gi around their body.
Lower: no gi you grap their quads & actual feet (I hate that)/ gi you can use trousers.
etc etc. That is just my $0.02 with the stuff notice. Gi, you have more offense & has tougher defense, no gi is easier to defend & harder to attack.