Babywatson..In my experience in the deep south...Clematis fair better with 6-8 hours morning sun..especially those varieties that get what you call "ugly legs" ..that is the one you said has the brown leaves..If you could post a pic ..we could try and id it for you...Pruning is done in late winter/early spring..the same time you prune your Roses in Spring, or when the Forsynthias are in bloom in your zone (For me that is Valentine's Day)...I would most probably "Hard Prune" your two clematis at that time...even if they are pruning group 2's it wouldn't hurt.... but would help your clematis to grow a stronger root system..if you want..you could move the one that has the brown leaves to a place similar to the other one...I have some that have alot of sun and get the brown legs but have plants with shallow roots in front of them to hide that...don't forget to fertilize them with either Rose Fertilizer (that has a High Middle number in the N-P-K Ratio) or Tomato Fertilizer when you prune them this coming late winter/early spring....and keep the roots moist..they love that...and I also top dress my clematis with some Composted Cowmanure too....Hope this helps...Jeanne