Are these two products alternatives?

No. One is a wall outlet and the other is a laptop. They serve unrelated needs, so pick based on what you are shopping for.

Which is better for charging a phone?

The ELEGRP outlet, at $18.27 at Walmart, gives you a fixed 30W USB-C PD port plus USB-A QC in the wall. The MacBook Air can charge a phone too, but it ties up a laptop port.

Is the MacBook Air M3 15 worth the extra money?

If you need a laptop, yes: $814.95 at Walmart buys an M3 chip, a 15.3-inch display and up to 18 hours of battery. If you only need USB charging, the $18.27 outlet is the sensible buy.

The outlet is a passive fixture with no battery and should outlast a laptop's usable life. The MacBook Air's 66.5Wh battery degrades with charge cycles over several years.

Can the outlet power the MacBook Air?

It can charge it slowly at 30W over USB-C, which is below Apple's faster chargers. It will top up the laptop over time but not at full speed.

Which has better ratings?

The MacBook Air has a 4.8 out of 5 rating from 968 ratings. The outlet listing shows no rating, so there is no direct comparison.

ELEGRP 30-Watt Type A & Type C USB Duplex Wall Outlet for PD and QC vs Apple MacBook Air M3 15

These are not comparable products. The ELEGRP is a 30W USB-C duplex wall outlet; the Apple MacBook Air M3 15 is a 15-inch laptop. Buy the ELEGRP if you need in-wall USB charging; buy the MacBook Air if you need a computer. On price, the outlet is listed at $18.27 at Walmart (37% under a $29.00 typical price), while the MacBook Air is listed at $814.95 at Walmart, marked 38% off a $1,321.00 regular price.

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