German to English translation: Why is there a difference in word count between Studio 2014 and 2015?

I am using SDL Studio 2015 and my client is using 2014.

We have a difference in the number of words despite using the same project settings.

- No TM,

- pre-translate filter @ 85%,

- Fuzzy match bands 85-94%, 95-99%,

- report internal fuzzy matches,

- report locked segments

 

They have a total of 137495 words on 2014 and I have 132759 words on 2015.