Dry hopping and making a hop tea are two different processes with two different objectives. Making a hop tea by boiling hops and straining the water is a way of increasing total bitterness in the ale. Dry hopping (almost always with whole hops) is adding unboiled hops directly to the fermenter or secondary to increase the hop nose.
You might want to try the hop tea first to counter the sweetness, then dry hop to improve the nose.
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