As wetwea33 said. The whoosh/ x47 will spool just slightly faster that the VT and the S280, but not in a way that will be "better or worse" for the street. I think it is hard to explain unless you drive them. The whoosh and x47 will spool quick and spike and have a higher peak tq but it falls off faster than my VT330R does. The S280 should be the same as the VT in that it will carry the tq flat lined from about 3,500-5,500. These things are really hard to explain until you drive them. The s280 will not be laggy like a big turbo car. You have to remember there are other variables too like timing that can play into how a car spools a turbo. The one advantage you will have on the stock fuel system is that on e30, the s280 will pull to a higher rpm over a whoosh/ x47 with the same fuel system. The x47 and whoosh will still start to die on most setups after 6k, even with aux. i run my VT330R to 7 on meth. thats a power band from 3,500-7k. That's really hard to beat. And don't get me wrong, the turbo will sool down low also. I'm hitting 20 psi by 3,100 rpms and the S280 should be around the same. Honestly, you will love the way the car will drive with that S280. ALSO... you will get better MPGs.
I apologize if I am confusing you by comparing the VT to the S280, but after comparing the two builds, They appear that they should have similar characteristics.