The OnePlus Open is expected to feature a folding mechanism that will be even more durable than the mechanism used by the Galaxy Z Fold 5.

Based on the revolutionary Oppo Find N3 foldable, the OnePlus Open is expected to feature impressive internal and external displays with a higher pixel density than the dual displays found on the Galaxy Z Fold 5. The OnePlus Open is likely to feature a 7.82-inch internal display with a resolution of 2268 x 2240 and a pixel density of 426 pixels per inch (PPI). Let's compare these specs to the Z Fold 5's internal display, which is 7.6 inches in size, has a resolution of 2176 x 1812, and a pixel density of 373.
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The external screen of the OnePlus Open is expected to have dimensions of 6.31 inches with a resolution of 1116 x 2484. If we compare this with the external cover screen of 6.2 inches on the Galaxy Z Fold 5, which will have a resolution of 904 x 2316, we can determine that the OnePlus Open offers higher resolution and screen dimensions.
The “hinge” on the OnePlus Open is believed to be more durable than the “Flex Hinge” used in Samsung. According to information from journalist Max Jambor, the OnePlus Open has been extensively tested and the device can be opened and closed at least 400,000 times. This number corresponds to opening and closing the phone 100 times a day for more than four years.
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In contrast to this, Samsung pledged to the owners of the Galaxy Z Fold 5 that the device will endure up to 200,000 folds. In India, the OnePlus Open can be bought for 124.990 rupees (1.510 dollars), while the Galaxy Z Fold 5 costs 154.999 rupees (~1.742€). At the aforementioned price, the OnePlus Open will be 19% cheaper than the Galaxy Z Fold 5.
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The OnePlus Open is expected to launch in late September or October. It will be powered by the Snapdragon 8 Gen 2 SoC, will have 16GB RAM , and will start with 256GB of storage. The cameras included will be a 48MP Wide, a 48MP Ultra-wide, and a 64MP Telephoto. There will be a 32MP front-facing camera on the outer display, and a 20MP front-facing camera on the inner display. The 4800mAh battery will keep the device running and ready to go.

It's expected that a OnePlus foldable phone will be more affordable than a Galaxy. However, the optimization isn't just limited to the lower price, but could also offer a more durable connection, higher-resolution displays with more pixels per inch, more RAM, more battery capacity, and possibly an improved camera.
Source: phonearena.com
