200GB or 50GB data(I think now is 18GB for fullnode db v2 and less than if you’re validator node) are after node download block and fetch data from block(contain: block data and info which be fetched from block). In db v1, still sync the block as db v2, but we fetched and storage data with a new way to reduce a lot of space of disk. The fact that, db v1 sync faster than dbv2 a little bit, because it not process and reduce space on fetched data much, on fetch and write, not redue anything -> db v1 is very bad in storage with a big space.
We also have plan to profile and optimize write data of db ver.2. It may take 3-4 weeks to find out a better way