Not to mention, as great as the emulation that's out today is for Dreamcast, it isn't perfect. So I would want to see direct comparisons to the game running on Dreamcast before making that call personally. Granted, I prefer my blacks to be inky black (since I'm a product of the CRT era,) but only if that's accurate to the devs' intent. And since I don't have access to the game on DC or an ideal display, I don't know what those scenes are "supposed" to look like.
Also keep in mind, they aren't using a wrapper. They're porting the actual source code to x86 from PPC RISC. So it's also conceivable changes have had to be made here and there, though it appears they've striven to keep them as minimal as possible. Look at the reflections on the blade in that screenshot. Clearly either the emulation is different to the original, or this remastered port is. Either way, differences between the emulated version and this aren't too surprising imo.
And frankly, the emulated screenshot shown looks too dark, and not because of good contrast, since the color contrast still looks more vibrant in the port shot imo. I don't remember the game looking that dark back in the day, but it's been quite a long while since I've played it on DC so as I said, I can't tell.
All I know is it looks like these ports are coming fairly soon and I'm excited beyond measure for them.