I don't think your standard 9070 XT will beat a 7900 XTX.
Maybe the very best 9070 XT OC model will tie a low performing 7900 XTX, but most 7900 XTXs have decent overclocking headroom too.
Ray tracing is another matter. Can a good 9070 XT beat a 7900 XTX? I'd say probably from the info I've seen so far.