alt Hacker NewsHmm that's impressive for a single plug fixing. The above for fix-v is from their load table at https://fiproductmedia.azureedge.net/media/Load%20Tables/Loa...
That's 0.43 kN which is 430N or ~43kgf. Comparing to the rigifix table they are using a heavier aircrete and a smaller safety factor, which would take fix-v up to 80kg but that's still a big difference. I wonder if there is a testing methodology difference, as usually resin fixings are considered stronger than plug fixings.
If it's just a threaded rod held in with resin then I expect the difference is in the hole size. The actual wall plug for the M8 Rigifix is 16mm diameter. Also the M8 bolt is inserted into a larger metal sleeve so it's less likely to bend. I don't know if that affects things though.