After a temporary switch to round brush I have to say that to me these are much better here.
With round brush I've learned that if you want to close from gums clean the teeth, the pressure on the gums is greater than these elongate brush.
This will not affect too hard but so that you get the feeling that they clean properly, especially the movable tip provides additional cleaning area and also passes between the teeth, depending on how much space you have in between, otherwise flossing.
In conclusion, to say that this brush me probably continue to help the teeth to keep them clean!