From their wiki:

What Makes Vostok Different? Void Linux is powerful — but it requires effort to set up. Vostok removes that barrier entirely:

• KDE Plasma out of the box — a full, polished desktop environment ready from the first boot
• Everything pre-configured — codecs, drivers, browser, fonts — all included
• Vostok Repository — hundreds of additional packages not available in the official Void repos (Brave, Figma, and more)
• Beginner-friendly, expert-approved — simple enough for newcomers, powerful enough for professionals
• 100% free — no subscriptions, no telemetry, no corporate strings
• One developer, one vision — transparent, independent, and built with love for the community
• Open to everyone — developers, designers, gamers, students, sysadmins — Vostok is for all of them

The em dashes definitely gives me LLM-vibes. Regardless, it mostly comes over as Void Linux with KDE Plasma and some onboarding. And I suppose they have their own repository. Furthermore, I think it’s a very new distro as their Github activities only go two months back.

To OP: Why would you use this over (some) other Void derivatives? Secondly, as you state

I can customize it myself

Why even bother with any of these to begin with?