In practice Ethereum's supply won't be unlimited. It will be limited by an increasing difficulty and a lower reward per time period. It will grow very slowly beyond 100 million. Of course it is still a much higher supply than Bitcoin, so it will be hard to match its price.
Yes, bitcoin's value is way too far than ETH. As of now, ETH value keeps decreasing while bitcoin as of the moment were kept on increasing although there are times it decreases but it just recover immediately. Lastly, there is a huge difference between the two and ETH will never reach the level of bitcoin.