I don't trust either one.
EOS doesn't have a working project, is run by an entrepreneur with a history of leaving projects half-finished (Dan Larimer), and is using its control over the Steemit platform to unethically market themselves.
IOTA lie about partnerships on a regular basis, and their tech simply makes no sense. It is like, "Yknow that hashpower that makes Bitcoin stable? Let's get rid of that. What could go wrong?"
IOTA is not secure. The ledger can be attacked. This will happen, and it will be ugly.
Even if you're just a trader looking for speculative profits, I'd steer clear of these. You
might come out ahead by the
greater fool principle, but it's very risky.