When it comes to copilot+ there are a few things to take into consideration.
Arm processors have gotten more powerful. More powerful = less battery life even on an arm cpu. Initial tests shows that a ryzen "hs" version cpu is pretty close in comparison to a new arm cpu in actual battery life. Even some intel cpu's are getting good battery life in some setups. The gap really isnt very far at all.
Additionally, intel and AMD are set to release their copilot cpu's very soon and it may be worth seeing how they compare. Additionally, Microsoft and Nvidia will be updating all 4xxx series gpu's to copilot + by October by the latest. Of course a Nvidia gpu will consume the most power "when in use" but it will also outperform any cpu by a very wide margin when it comes to using any actual AI.