The dampers on the z/28 are digressive. No other damper, coilover or not, is really comparable for performance to comfort ratio.
As shown and explained here:
https://www.caranddriver.com/news/fr...pers-explained
That's a good read to understand the variance in the damper technology and impact to the ride/comfort aspect of the car.
The millions of dollars of R&D and time spent at Nurburgring swapping spool valves... doubt the OP buying Ohlins is going to provide supple on road ride quality and perform a the same level as the 'stock' Multimatic DSSV units. Would need to truly understand how to set up the coilovers, especially for the 5th gen's suspension/chassis/mass