I wouldn't get hung up on tongue weight specs out of the book, as mentioned, what matters is when your loaded. How you load the trailer can drastically change any spec weight.
And I can tell you, every trailer tows differently, and different tweaks can be made for towing any given trailer with the same TV. For example, not every TV or situation, will increasing tongue weight, make for a better tow...even while staying under 15%. Some set ups don't work well with heavy tongues.
So anyway, its this "fine tuning" that no one here can answer for you, because its all guess work until the rubber hits the road! And I would wage that you will connect either of the options you're looking at, without much fine tuning at all!