6.56 RotationMatrix and RotationTransform

The call for each is as follows

p1 = {1, 1}; 
p2 = RotationMatrix[30 Degree].p1; 
o = {0, 0}; 
Graphics[{ {Red, Arrow[{o, p1}]}, 
  Arrow[{o, p2}]}, Axes -> True, ImageSize -> 100]
 

p1 = {1, 1}; 
r = RotationTransform[30 Degree]; 
o = {0, 0}; 
Graphics[{ {Red, Arrow[{o, p1}]}, Arrow[{o, r[p1]}]}, 
   Axes -> True, ImageSize -> 100]