I guess you'd have to do a surface inventory after each wash to try and sleuth out where the marring's coming from after trying each method.
Personally, I didn't care for ONR as a rinseless in general (found road grime clung to the surface much easier than before I started using it as a RW). I can't say using the Big Red Sponge contributed to any marring on my paint, but I've got pretty hard Audi Metallic.
In cold weather, I tried ONR Wash and Wax and thought it took notably more buffing than Griot's Rinseless Wash and Wax.
To compare "leave nothing" rinselesses, I've also found Griot's Brilliant Finish Rinseless to "buff off" easier (for me) in comparison to N-914. Last time I used 914 I thought the Brilliant Finish had slightly better cleaning power (both of them were mixed at the prescribed ratio on their respective bottles).
I'll confess a slight Griot's bias in general, but it's largely because I've found their stuff to require much less mental bandwidth to get good results.
I'm still trying to hit my stride with Hydrate. Are you using barely any when you use it? I'm probably over-applying. Also, have you noticed it affecting your water behavior? Seems to slow water shedding for me, but again I feel like maybe I'm using it wrong.