Lily 2 vs. Lily 2 Active

Can someone help me decide what will be most useful for my purposes? Core needs:

• Woman with very small wrists
• Needs to be suitable for a dressy office environment
• Sleep tracking is the core functionality I want from the activity tracker - bad sleeper and my phone app is not accurate at telling when I'm awake vs. not due to ambient noise
• Step counting is the other core functionality (so I don't have to have my phone on me while I move around the house)

Nice to haves:

• Stress monitoring throughout the day
• Telling the time
• An alarm on my wrist that doesn't disturb anyone else

I will never use features like getting texts etc... and I'm not into exercise enough to really want to track it deeply (I'm good with my gym routine being untracked). I think the Lily 2 is good enough, but wouldn't mind knowing others thoughts for those that wanted a more 'simple' activity tracker in a nice package.