Answer:
 Both models of pizza represent single model. 
Step-by-step explanation:
The models for both the pizzas is attached below.
Figure (1) represents the model of  of a pizza pie.
 of a pizza pie.
It shows how a pizza cuts into four parts and shaded part represent the third fraction of it.
Similarly, figure (2) represent the model of  of a pizza pie
 of a pizza pie 
It shows how a pizza cut into eight parts and shaded part represent the sixth fraction of it.
On comparing both have same shaded area,  also fraction   when reduces gives same fraction as
  when reduces gives same fraction as  .
.
Thus, both models of pizza represent single model.