Cumulus Aerial 180 vs Zpacks Summer Quilt?

Both of these are rated for 40 deg F (4.5 C). Both are fairly close in weight: Zpacks quilt: 9.1oz (+0.2oz for sleeping pad strap) and Cumulus Bag 10.6oz. Both are a similar cost.

I am accustomed to sleeping in bags OR quilts, though I find a mummy with a hood annoying in the warmer months. I usually sleep on an inflatable (Neoair Xlite). I will probably use a down jacket to extend the range (of either bag or quilt) for occasional temps down to freezing.

Which is more versatile? Any known drawbacks of either design?

Thanks in advance for your ideas.