Mark Wilson, writing for TechRadar:

In what could be a disappointment for those hoping for upgrades like a 1-inch sensor, the Action 5 Pro’s key specs appear to be identical to the Action 4. These include a 1/1.3-inch CMOS sensor, f/2.8 aperture and 155-degree field of view.

I’m in the market for an action camera, and want to avoid the GoPro lineup whose development has mostly stagnated in recent times. I already have the Insta360 X3, so the Insta360 Ace Pro seems like a natural buy for me as it would be in the same ecosystem and use the same apps, the DJI Osmo Action 4 is a solid product that has been getting rave reviews from the everyone. If the release is happening soon, I might just wait for the Action 5 Pro instead.