That doesn't necessarily mean they don't share the same ownership. Their Telegram staff has given wrong answers before, like when they said BFG would be released as a TRC-20 token. Another coincidence besides the UI is that they both registered their domain with GoDaddy and use Cloudflare as their DNS provider. If you look at the next biggest DEXs, Pancakeswap, Uniswap, Sushi, Lavacake, and Polycat, none of them use the same registrar + DNS combo as BetFury.
Is it really that important?
The issue with the migrator and not having a timelock was a big red flag for Biswap. That's why they decided to add the timelock to their masterchef contract. If we knew there was a reputable developer team behind the exchange it would have alleviated many people's worries. A casino that has spent so much effort building their brand, developing their project and getting licensed is not likely to ruin their reputation by rugpulling their exchange users.