I am more excited about the new Scorpion pistol, too, for two reasons: the MSRP, and the cost of 9mm.
For what I want it for (a plinker, self-defense, a "lady's" gun, a first-time shooter's gun), the 9mm Scorpion will serve pretty well. I like both pistols, and I really want a .223 caliber pistol, but I don't know if I want to pay that MSRP. The upside to that is I probably won't want to mess with the new Bren, and I might leave it essentially factory. But the downside to the Bren is that I have several custom or factory pistol builds that would be cheaper or in the ball park of the CZ gun. I'd have to know more about "why I should want this gun" over a Midwest Industries pistol (~$850 MSRP) or a custom AK .223 pistol (if I can find one) or some other random .223 AR pistol then customized most likely. Heck, it's appealing to build a .223 AR DI pistol from scratch, and would still likely be under the CZ Bren budget.
The new Scorpion, on the other hand, is a no-brainer for me. Cheap magazines. Cheap caliber. Likely, it's lower-weight than its .223 pistol buddies (usually around 7+ lbs). Hopefully, the CZ Scorpion is around 5 lbs with the brace.