Deck drainage system or French drain?

We have a 30 foot deck that runs along the back of our house and extends 12 feet out into the yard. It sits about 2 feet off the ground. Our basement gets water seepage in the spring months (march/April/may) from this back wall of our house (seepage comes in from where wall meets basement floor). I am in the middle of rebuilding the deck. To help with the seapage problems - would it be worth it to add a deck drainage system (such as this: that drains into a gutter at the far end of the deck away from the house? Or is it better to put some type of external French drain to divert water instead?

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