DLSS will provide some better performance than TAA - but it definately comes at a cost in quality- spesifically ghosting/smearing/blurring on instruments. Youll notice it soon enough if you spend time in the cockpit and looking at digital instruments. There is more and more examples in threads apperaing now.
one example here:
I too was hoping for a great DLSS , but was sadly disappointed.
Im sticking with TAA 70% @4k for now (which also has some ghosting, but at least not on instruments).