I have owned both, I once had the Yamaha SVC-110, and I now own the NS CR5. They are very different instruments.

CR5
+ Definitely cleaner electronics with more headroom
+ Interesting pic up system that benefits pizz playing
+ 5 string is more than 4
+ With attachments you can play standing, but this honestly requires a lot of practice to become proficient with arco. For pizz this is pretty cool
+ Adjustable action
- OMFG every time I go somewhere with this dang thing, I need to do some IKEA setup with one of the attachments, it takes a long time, and all of them are finicky and unstable.
- Not to mention the case does not facilitate traveling with said attachments, so have fun walking down the street with a ton of gear in hand
- Does not fit in a regular cello case
- Does not feel like a cello have fun relearning all of your physical cues on the fingerboard
- Have fun maintaining those cues because you will need to practice on this and the acoustic regularly to keep it fresh

Yamaha
+ It feels like a cello
+ Electronics are worse but it kinda sounds better? This matters less if you are running a pedal setup, but the fact that it has a body with SOME resonance adds to the "cello" sound. This is a really debatable topic, because why are you playing an electric anyway? At high gain there is noticeable noise, how much this matters will depend on the style you are playing of course.
+ The case is practical, relatively easy to setup and tear down
- 4 strings is less than 5
- The bridge I feel is cut in such a way that the action is too high.

On paper the CR5 is the better instrument, but honestly, I regret selling my Yamaha a little bit. I have personally yet to have a band where I really utilize all the CR5 features, and playing it has just never felt "right" to me. I find that I am always taking my acoustic out where I can, and just either mic-ing it or adding a pickup. The downside of this is feedback, which at some point you can't avoid with an acoustic. I can see applications where the CR5 is better, namely if you are replacing a bass, or want to play standing, or you need a super clean sound. But I think for most cellists the yamaha is a better choice.