Filecoin vs FLO - What is the difference?

FLO is being used by Open Index. It helps write metadata to blockchain. Why would filecoin be used instead of FLO?

https://flo.cash/index.html

Because FLO is a bitcoin knock-off allows you to write 1KB of data per transaction while IPFS can store petabytes of info?

PoW vs PoSt & PoRep
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