I get a lot of voice-mail messages. I don't get a lot of text messges. (fewer)
I get fewer text messages than voice-mail messages
I spend a lot of time on the phone. My brother doesn't spend a lot of time on the phone(less)
My brother spends less time on the phone
My parents didn't send many e-mails last year. The send a lot of e-mails now (more)
They send more e-mails now.