Both classes can tank in groups and solo great (amongst melees).
The pally has far more efficient heals so assuming the mob doesn't hit like a freight train you will be fine. If so, and rootable, the pally again is fine. My wife was soloing in velks in the mid 50's with her natures defender, no haste, and cultural crafted armor. By solo, I mean she was mobbing the Hell out of the ground floor.
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My SK was always more creative. Pulls, solo quests, exploring, etc. Granted I did have Death Peace at 65 but I pulled Vindicator on a few occasions for my guild. FD casting sucks compared to being a monk but having it at all is amazing (along with 2 invises). Soloing outdoors the SK has an advantage for most mobs especially if you consider the pet does decent damage later on.
Either way you will be jealous of the other class at some point. SK's for the trixy snare FD pulls and invis; Pallies for Celestial Cleansing and LoH. Go with your gut and pick the one that seems more fun.
In the end people will still compare you to Monk's and Warriors for your wimpy dps. There are more important things in life though...like dueling.
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