Is it possible to use 1 iCloud account for 2 phones without them combining the photos/videos

I want to buy a new iPhone and I currently spend $10 a month on iCloud. I was wondering if it were possible for both phones to use the same iCloud to upload photos/videos to the cloud WITHOUT syncing their photos together? I want them to be completely separate but share the space. I don't care about any other aspect besides the photos and videos.