At the initial time of integration, the ratio of STEEM to TRX was 2:1, meaning users as at then receive twice TRX as SP on their payout, but due to market conditions and some factors, this has continued to reduce overtime, currently, 50% SBD / 50% SP payout receive 0.25TRX to 1 SP, while Power Up 100% receives 0.5 TRX to 1 SP and this was announced in the latest development by steemitblog.

You are right, at the very initial start of the integration, users with 100% power up payout used to be receiving twice TRX as SP which is 2:1 and users with 50% sbd and 50%sp received 1:1 ratio of the payout. That’s at the very initial start. But with how the market fluctuations and other factors, the ratio now is not fixed but keeps on changing with the effect of the market. Also with how the TRX token takes time to reflect in our wallet is also as a factor or influence of the market. Good luck