Neither is very good unguided. The 200mm lens would be better than the scope due to is shorter focal length and hence more exposure before you get significant star trailing.
To start unguided to need a nice short focal length, say 12 to 25mm, and a fast aperture, say f/1.8 or better. These sort of lenses will allow you to get to about 15s, or maybe 30s, without objectionable star trailing.
The longer the lens/scope, the better your tracking/guiding needs to be.
Good luck!
Al.