I've never used ripple or stellar, but I've used tron trc20 tokens a couple of times, but I will still cast my vote for stellar, at the initial stage, alot of hype was built around tron, then, it was worth far more but all of a sudden, the ceo went silent as he got tired of hyping tron, stellar grew organically to where it is today, so for me, I think stellar is far better than ripple or tron.