FYI, while there is not seamless migration methord between different Zigbee gateway solutions there is a way to partially migrate your Zigbee network from deCONZ to the ZHA integration so that you at least do not have to re-pair all your devices, see these instructions (which works for all types of Zigbee Coordinator USB radios and not just SkyConnect) → https://skyconnect.home-assistant.io/migrate-conbee/
But since the ConBee works best with deCONZ but not quite as good in other Zigbee gateway solutions my suggestion would be to buy a new CC2652P based Zigbee Coordinator USB adapter like ITead’s “Sonoff Zigbee 3.0 USB Dongle Plus” (model “ZBDongle-P”) and try that with both Home Assiistant’s built-in ZHA integration and Zigbee2MQTT seperarly to see which interface you like the most.
Also note that most if not all comparison threads of all the popular Zigbee gateway implementations that use Zigbee Coordinator USB adapters like ConBee quickly get very old and outdated as the development progresses of at least ZHA, Zigbee2MQTT and deCONZ/Phoscon moves relatively rapidly, so while not quite what asked for but you might glean some insight from these other existing threads, but the gist is that you should not take anything written more than 6-months ago as being the truth today, and even more have changed in the last years.