Dreamcast spawned Sonic Adventure 1 and 2.

So I have to say Xbox.

He just needs to read the book Opening the Xbox.  Xbox was nearly fully BC with all DC games. MS used Dreamcast on focus tests developing Xbox and as you pictured they modeled their controllers after DC and nearly used VMUs.  Tho DLC was around in the 80s and even N64 had DLC so while DC did have DLC for games like Skies of Arcadia, it wasn't new. Just slowly becoming more standard.

I never got the chance to play a Dreamcast so my vote is Xbox.

I actually feel like DC and Xbox have a very different vibe; DC was like an arcade machine squeezed into a console box while Xbox was a PC squeezed into a console box, and late 90s arcade gaming and 2000s PC gaming were quite different in feel and philosophy. Maybe that's just me.

On a literal level this is correct. Dreamcast hardware was used in Arcade machines as the Naomi board. Xbox used PC parts and the controller ports were USB 1.0 just with different connectors. You could splice USB cables with Xbox controllers to work on PC and many did. You have to understand tho. SEGA fans were homeless. MS had connections with SEGA from DC and had a lot of ties. It was the perfect place for SEGA fans to go to. Sony and Nintendo were seen as rivals/enemies for years.

I was more referring to just the general vibe. Arcade ports were a big part of Dreamcast while Xbox was characterized by PC ports like Doom 3 and Morrowind. There's a big difference in feeling between PC and arcade gaming.

The OG Xbox is the best Xbox console and had much better games so it wins easily.

Xbox wins this one easily and honestly DC is mostly nostalgia dust by now. Yes, it had some amazing games in a short time span, but the Xbox had a bigger impact on the industry and managed to gather a far better gaming library. While most every major Xbox exclusive is still highly playable today, I would only go back to games like Power Stone and Crazy Taxi (Maybe a bit of JSR) on the DC. I'm sorry, I know that the DC was a great machine and the last great "hurrah" from Sega but the Xbox managed to outlive and outclass it on every front.

And for people who say that the Xbox was a spiritual successor for the DC, while I get that point, I always felt that the Xbox was trying something on his own, and it was more like a hybrid PC and Console approach. It had some great Sega exclusives but also some awesome PC exclusives, especially in the later years.

Dreamcast easily for me. Hate to state the obvious but it was way ahead of its time producing graphics that competed with consoles that came out 2/3 years after it. Also had more innovative games for me that still play great today. Also who doesn't love the little VMUs, they were unnecessary with most games tbh but the few times they worked they added a little something that we haven't had with any other console!

Biggest thing that held it back was the controller - I still don't know why it didn't have 2 analog sticks as that was the new norm. Xbox also launched with a shit controller but they did at least upgrade it with a much better 2nd revision.