Here is some news about eGR:
Currently, eGR has started small-scale tests in the pre-production and final stages, and it is expected to be available for sale in early next year (after the 2024 Chinese New Year).
I have some pictures of eGR from friends who have received the kit.
https://photos.app.goo.gl/Cc4wmfB5XBxMcgTw7The main focus is on comparing the weight with the GRT Mechanical Carbon Fiber Hydraulic Kit:
The eGR rear derailleur is 65g heavier than the GRT rear derailleur. The new version of the clamp has a more refined appearance and is 45g lighter per pair. The eGR shifter no longer has a gear mechanism, making it 52g lighter per pair. However, due to the additional weight of batteries and cables compared to the mechanical kit, it adds approximately 78g. Therefore, the eGR weighs about 50g more than the GRT carbon fiber overall, excluding the battery mount plug.
The eGR brake lever and rear derailleur housing are made of carbon fiber, while the rear derailleur guide plate is made of aluminum alloy.
Compared to eR9/eRX, the shape of the eGR brake lever is less outwardly extended, the button shape is larger, and the button travel has increased, resulting in a better feel. Apart from these changes, there are no significant differences.
Although the eGR left-hand side has buttons, it has been confirmed that it cannot control the same rear derailleur with two hands like SRAM. The buttons on the left side may be designed for electronic seat post adjustment (I'm not sure if this is accurate).
The eGR features a newly designed integrated clamp that is lighter in weight. However, due to Shimano's patents, there have been no improvements in the bleeding method.