Well, that's a good question and I doubt anyone has actually compared the two in regards to heat.
My guess would be the heat radiating from the 200 would be easier to manage since its in one place.
The 200 would have more penetration ability however it wouldn't give you the coverage all the little ones would.
Using 10 23w would be a pain in the ass constantly moving them as the plant grows.
If it were me, i would go with the 200w and bend the plants, maybe use a screen to keep the canopy level or possibly curved to form around the lighting.