सम्भावनमथोत्प्रेक्षा प्रकृतस्य समेन यत्। When probability of upameya as identical with upamana is stated, it is उत्प्रेक्षा.
स्त्रीणां विरेजुः मुखपङ्कजानि सक्तानि हम्र्येषु इव पङ्कजानि।
(Meaning of the shloka - Lotus like faces of women looked beautiful like the lotuses embedded in a balcony.)
Here 'face' is upameya and 'lotus' is upaman. Here it is desired to depict (Upameya) face probably as (upaman) lotus... So here the figure of speech is utpreksha.
In other words meaning of the word इव which indicates comparism is understood as 'as if' in 'Utpresha' figure of speech. Moreover, the relation of the unchangeable word इवं is with verb and not any word that stands for door of an action ie.e., noun. (while in similie in the context of meaning it has relation with a noun. In short, there is an element of probability, suppossition or imagination in Utpresha)
(In lesson 9 in a line (meaning parts of the body - are as if being daubed. The sky is as showering collyrium eye-salve) also the figure of speech is utpreksha.