News Arduino Announces GIGA R1 WiFi, Its Most Powerful Board Yet

Nice board, but how is it more powerful than the Arduino Portenta H7?

Hardware - Portenta H7 (arduino.cc)

If you mean the most powerful using the Mega form factor, then, ok, sure, or most powerful non-pro, yup, but not the most powerful Arduino board, all categories.

The Portenta H7 has 2x 80-pin connectors for GPIO, etc, 8x as much RAM and Flash, 10/100Mbit ethernet, ...