Compared to the Nano yeah, which is just the same SoC since a long time.
Xavier NX is 21TOPs at 15W for the whole SoC... but the pricing at $399 puts it in a different category...
Google should just start selling the USB sticks at the same price as the M.2 Corals, with them being used on RPis I think...
the attraction of coral is supposed to be the inference engine. 4 TOps/s at 2 watts is... impressive. Jetson takes 10 or 15 watts & tops out a little under 0.5 TOp/s. those are much more flexible gpu cores but that's 60x efficiency gain & centered around a chip that is much easier to integrate into consumer products.