The Energy is the only ball I can think of in their premium line that would be roughly equivalent to the Fired-Up. Like the FU, it has a strong cover and a strong-ish core. Soaker covers are usually a notch strong than equivalents of other manufacturers' lines, but the Reactor on the FU is a new stronger cover.
I don't think they're precisely comparable, as few resin pearls work on TRUE medium oil patterns.
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"...for advice is a dangerous gift, even from the wise to the wise...."
J. R. R. Tolkien