When two figures are congruent they have the same size and shape.
Let's check both given figures:
MJ≅EB
JK≅BC
ML≅ ED
Hence, Figure BCDE is congruent to Figure JKLM.
Now, when two figures are similar they have the same shape, the angles are congruent and the ratios of the length of their corresponding sides are equal. In this the figures are congruent, then they are also similar.
The scale factor for congruent figures is given by 1 because their corresponding sides are equal in length.