the pronunciation of species

[Aghmore]

Hi dear all

In many speeches and lectures that I have ever listened till now containing the word species, sometime it has been pronounced like "spi:shi:z" and other times I could hear "spi:si:z". Is there any difference between them or not?

Thanks in advance

[Cristiana]

I think it depend of the place where people speaking are from, but I'm not sure
Bye