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Unfortunately I don’t have any information on those and since I already have LPIC 3-303 I’ll stick to those when it’s time to renew my certification

The Red Hat ones are definitely tuned to Red Hat Environments. If you‘re sure you only walk in the RedHat Ecosystem, then you should go for RHCE or RHCSA. I had a Red Hat Learning subscription once, and they never mentioned other Linux systems at all, only Red Hat. Unfortunately I never went down the Red Hat only route so my company opted for the LPI certification. The LPI certification also touch a lot of stuff that isn’t essential for every day system administration like openvpn and its various parameters.

From my personal experience, I know more people that have LPIC 1 or 2 certification than a Red Hat one. But this could just be the German market.

From my own experience, LPIC 1 was a walk in the park compared to LPIC 2. The sheer amount of objectives in 2 is insane, so I would suggest you focus on LPIC 1 (101 and 102) until you have passed the certification. Your certification will be valid for five years and that it enough time to prepare for LPIC 2.