Workforce is CN or UN?

English as a Second Language English Vocabulary, Grammar and Idioms
1

Correct or not correct? Same meaning or not same meaning? Workforce is CN or UN?

a. This company has an over 800-strong workforce.
b. This company has a workforce of over 800.

thanks

2

In both sentences workforce stands for the people engaged in or available for work in a particular area, firm, or industry.