It has same config as in integrated form. Obviously we don't know if it's faster than that or meant to emulate it (we don't know memory config and power limits). Still, doesn't look too bad considering that the drivers are far from being optimised and likely just for debugging purposes at this point.
The DG1 sample is performing 59% faster than the Tigerlake sample in the 15 W APU. Clearly it's being clocked significantly higher and probably using faster memory. Having a significantly higher core clock and (probably) using faster memory will cause the power use to be much, much higher than what the APU is using at 15 W. If you look at DG1's best graphics sub-test, it has a 42.3% lead over the Ryzen 4800u, but then if you look at the Tigerlake APU, the Ryzen 4800u is 49.4% faster than the Tigerlake APU, and this is still Vega in the Ryzen APU, not even Navi yet.
So how much power is the DG1 sample using? Obviously we don't know but it's safe to say that it is no where near 15 W. That's why I said performing well is relative when you realize the DG1 sample is taking so much more power than the 4800u it's being compared against. When you look at an APU in the same power envelop, it gets crushed by the 4800u.
I agree it's too early to make any conclusions, which I already mentioned, and that significant gains could be had with further BIOS tweaks and driver developments, but for now we can just react to what we have and these early results don't aren't looking good for DG1, even if the underlying architecture is a step forward for Intel. Hopefully for their GPU team, their driver state is incredibly crude and they are leaving the hardware's potential extremely untapped up to this point.