Nice one Chris
Unfortunately some of those are no longer available. As that thread suggests, assuming the newer model of a discontinued one is going to be better is dangerous. Sadly.
Personally I am currently working on the "Mercedes approved" theory. Pic a Mercedes model of the same size weight and rear drive as the omega, with the same wheel size, and pic the Mercedes approved tyre for that model.
Mercedes seem to be the only manufacturer (afaict) that go out of their way to test tyres that are NOT original equipment. In other words, Merc owners can wonder out in to the tyre market mine field and purchase an after market tyre of varying price and performance level, that they KNOW is going to work on their car and wheel option. Provided it has an MO (Mercedes Only) stamp. Mo work on other models as well though.
Its something that does endear me to Mercedes tbh.
...that's the theory so far anyway.