The refreshed RTX 2060 / 2070 laptop GPUs have slightly higher clocks compared to the original Max-P versions and they feature similar hardware optimizations from the Super SKUs, including lower-voltage GDDR6 VRAM and improved current regulators. On average, these GPUs should provide at least 7% higher performance compared to the original Max-P models.
https://www.notebookcheck.net/Nvidia-sneaks-refreshed-RTX-2060-2070-Max-P-laptop-GPUs-along-with-the-new-Super-lineup.460740.0.html