Ok, so now I've got 4 different LR 510 attys. The *original* ones at 1.5 ohms, some SLBs at 1.8-1.9 ohms, Joye LR 510s at 1.4-1.5 ohms, and a couple of MadVapes's Bauways, both at 1.7 ohms.
The *original* ones tended to have a bit of a harsh, metallic taste at times. The SLBs had a harder draw...