Sony WF-1000XM5 vs Soundcore Liberty 4 NC

The published figures

Why the case total is the travel figure

Eight hours covers a transatlantic crossing. It does not cover a connection, a layover, the second sector and the taxi at the other end — and on a travel day there is frequently nowhere convenient to charge.

Soundcore publishes 40 hours with the case in noise-cancelling mode, and 50 in normal mode. That is a published figure for a whole trip rather than a single flight, and it is the strongest argument on this page.

Sony publishes 8 hours with cancelling on and 12 with it off in the specifications we compiled; a case total was not published on the page we read, so we do not print one.

The missing price, again

Sony does not publish a price for the WF-1000XM5 on the specification page we compiled, so its value axis cannot be scored. Soundcore publishes $99.99.

Neither maker publishes a warranty term on those pages either, which means neither earbud can be costed per covered year the way the bags on this site are. That is normal for consumer audio and worth stating plainly rather than quietly dropping the column.

If you want to sleep in them

Earbuds are better than over-ear headphones for sleeping on a plane, for the obvious reason that you can put your head against a window. Both of these are small: a published 5.2 and 5.9 g per bud.

But active cancellation is built for constant low-frequency drone, and the noise that actually wakes people on a plane is irregular and mid-frequency — a baby, a conversation, a trolley. A certified earplug handles that better than either of these, for a fraction of the price. The sleep kit, with the published numbers makes that case in full.

The practical details that decide a flight

Both publish IPX4, which is a splash rating rather than a waterproof one — enough for sweat and rain, not for a dropped case in a puddle. Both charge over USB-C, so neither adds a cable to the bag if you already carry one for a phone or laptop.

• Case size is the real carry cost. Sony publishes 5.9 g per earbud and a case of approximately 39 g; the pair and case together are a published 0.112 lb. Either disappears into a personal item in a way an over-ear headphone does not.
• Wired seatback audio needs an adapter either way. Neither of these connects to a 3.5 mm jack, so if you use the screen in the seat in front of you, budget for a Bluetooth transmitter on top.
• Neither publishes a warranty term on the specification pages we compiled, which is the norm in consumer audio and still worth knowing before you spend $99.99.

The verdict

Buy the Soundcore Liberty 4 NC if

You are optimizing for a travel day rather than an album. A published 40 hours with the case, 5.2 g per bud and a published $99.99 is the most complete set of figures on this page, and the only one we can put a price against.

Buy the Sony WF-1000XM5 if

Sound quality and cancellation performance are what you care about and you are buying on reviews of how they sound rather than on published specifications. We do not test audio and will not pretend to rank it — what we can tell you is what each maker commits to in writing, and Sony commits to less of it.

Consider over-ear instead if

You want maximum isolation and do not need to lean on a window. Sony’s own over-ear against its earbuds is the comparison for that, and the weight difference is substantial: a published 0.553 lb against 0.112 lb for buds and case together.