Vlad tapers off damage wise later in the game unless he is stacking or fed, but he is VERY durable as far as casters go, with really good escape mechanisms.
Brand is much for AOE damage capable (sans Vlads ult) but it a bit squishier.
I'd probably go for Brand, but thats because I have played a decent amount of Vlad and have decided he doesnt fall into my favorite playstyle.
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