The conservatory on the first one is bound to be freezing on winter evenings - all that glass looking at the night sky. It will eat energy. Not sure that room would be useable a lot of the time?
(Personally I also hate the thought of sitting in an illuminated box not being able to see out while people could see in, but I accept that's just personal taste...)
Mind you those dormers are likely to be a bit cold too, and there can be a a risk of damp/mould on the "cheeks" too, so make sure you look closely if you are going for #2