I don't think they should be even compared. Twitch is way more mature and knows their target audience. On the other hand i still don't know what kind of place DLive will be in 5 years, it's still kind of all over the map and it has 1.8 stars in appstore with only 4K Ratings.

I am pretty sure twitch keeps ruling with live streams as it already has an edge as a leader, at least with online gaming. Gambling on the other hand can be tricky to broadcast without decentralized service like DLive as there are ton of games that aren't licensed in United States.