The effect for both coins, I say that being in Binance, it's a huge advantage for those coins because the highest liquidity IMO comes from that exchange and it's always bringing that impression to coins listed there.
Just wondering regarding future impact. Im surprised these coins havent been on binance until now, yet they have benn doing so good without being listed there.
When you ask about a decentralized stable coin, most people will say the number one choice is DAI. And Binance have found them and just got them in.
If they did good before even they were not in Binance, this will make them even better.