Yes, the price is unbeatable and therefore you should really click 3 stars, but that no one reads :)
My analysis was as follows:
Color and material of bristles and shaft are comparable to the original (the bristles appear to be slightly harder to me)
However, the sectional shape of the bristles does not match the original, which could become a problem (see figure). The purpose of this Zahnbürstentypens is that in the space of teeth and gums, the brush at an angle - ie at the tooth neck - holds, then waits a moment, that the head can move and clean the teeth and then goes to the next tooth. For the original essays have (and this one) clearly visible on the bristles cut two arcs in transverse direction, so you may well create the brush to a molar or two incisors (see illustration).
The difference from the original lies in the detail. To really create the brush into the space of tooth and gums, the brush must be additionally cut wedge-shaped in the longitudinal direction (that is, all bristles are located on the middle Längsinie (parallel to the brush neck) longer than the rim). This configuration has been saved here (see figure). Instead, give it just the two eye cut sheets described above.
I think that the good cleaning success of these toothbrush thus suffering because they no longer comes into the angle.