found out my relative went through what I went through

so me and my relative are one year apart and for some odd reason derealization and depersonalization popped up in our convo and he told me what he went through and coincidentally I went through these same thing... (started with existential thoughts about life. after high school) he said he sees it as an “awakening” and he just accepted it... he also said sometimes it hits him when he’s driving. my question is why is dr and dp a plague for me, but not for him? I feel like dr has distorted my perception of life... like one second I feel okay and the other second the world and my life doesn’t seem normal... I also have Pure O OCD so I’m more prone to obsess with thoughts/feelings that upset me. It was weird to me when he told me he went through dp and dr, because I would’ve never known... and ever since then I keep thinking why is this shit tearing me a part giving me depression, but not him?