The OneWorld business class lounge is connected to the first class lounge via an open door. Since the lounge was more or less empty I briefly ventured over there to check it out.

Door from OneWorld First Class Lounge to Business Class Lounge LAX
The business class lounge was arguably nicer, as it had a greater variety of seating options. There were couches, dining tables, lounge chairs, etc.

OneWorld Business Class Lounge LAX seating

OneWorld Business Class Lounge LAX seating

OneWorld Business Class Lounge LAX seating
There were also about a dozen iMacs lined up along a wall.

OneWorld Business Class Lounge LAX seating

OneWorld Business Class Lounge LAX seating

OneWorld Business Class Lounge LAX seating

OneWorld Business Class Lounge LAX seating

OneWorld Business Class Lounge LAX seating

OneWorld Business Class Lounge LAX seating

OneWorld Business Class Lounge LAX seating
Furthermore, as a cappuccino-holic it’s worth noting that while the first class lounge has a self-serve cappuccino machine, the business class lounge has made-to-order cappuccinos from the bartender.
Oddly the business class lounge actually had a more extensive food spread than the first class lounge, as it had four hot dishes.
Beyond that it had chips, meat, and the same cold options available in the first class lounge.

OneWorld Business Class Lounge LAX buffet

OneWorld Business Class Lounge LAX buffet

OneWorld Business Class Lounge LAX buffet

OneWorld Business Class Lounge LAX buffet

OneWorld Business Class Lounge LAX buffet
The alcohol selection wasn’t quite as extensive as in the first class lounge, though.

OneWorld Business Class Lounge LAX bar
On the whole the first class lounge isn’t really any nicer than the business class lounge, and arguably the business class lounge is maybe even nicer. That being said, I’d guess that during peak times the first class lounge is much quieter than the business class lounge, so it’s probably nice to have the added privacy, even if the lounge itself isn’t nicer. Of course, if I hadn’t been in a premium cabin, there are a number of options available in LAX for anyone with a credit card with lounge access.
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