Thanks for your input, Alex. I ended up biting the bullet and buying a spool of Riptide Hollowcore in PE6. The 400m spool filled my Stella 14000 perfectly, with a bit left over. Beside my "60lb" JB Hollow, it looks and feels very similar. Recently used it on a trip - got flogged over five days' casting and caught some fish to 20kg. Handled well; only noticed a bit of abrasion above the FG (not unexpected, and not vastly different to other brands). Did pop a big fish, but that was a reefing, and an essentially unavoidable one at that. So far, so good, methinks!
PS. Would be interesting to see a Paulus test... thereagain, breaking strain means less than shock loading. Might still flick some to him.