R45 is way more powerful and spinny, plays in a different league, even to almost rival R48.
Hexer Grip is a nice rubber nevertheless.
R45 is no beast no handle, so I would say it gives MORE control through more options/gears.
Overall, don´t be fooled by the same nominal hardness. Hexer Grip is a family VW Golf, Rasanter 45 is more like an R32.