Who said you can’t discuss it?
And I don’t give two s$&ts about which one measures better. I guarantee you one will sound better than the other. And if I were shopping at that level and the 1400.00 preamp sounded better, I’d buy it and keep the difference. If the more expensive one wins, then I weigh the delta and decide if it’s “worth” it to ME. If it is, then I spend MY money.
Worth is such a subjective term. So no need beating this thing to death. You are welcome to if it suits you because this is, as you suggest, an open forum for such things.