Launch vs. launch: Comparison that the first impression of both products made. Unbiased since it treats both products the same. Obviously not going to be used for an immediate purshasing decision.
Launch vs. been on the market: Comparison of current prices. Valid in order to make a pruchasing decision at launch, but has an inherit bias as you are not comparing both products on equal footing and launch prices tend to change quickly.
Your claim that the first comparison is "unbiased" makes no sense and relies on the specious claim that a comparison between "launch vs. been on the market" involves bias. Such a comparison involves no such thing. Bias, as mentioned previously, is the tendency of a person to judge in a way that is not impartial. A comparison between two products on the market based on their current features and prices, regardless of their release dates, is completely impartial (if we exclude other factors, e.g. brand loyalty).
This couplet relies on a false dichotomy and a patently false understanding of what a "bias" is. If considering the time of release introduces bias, then which differences between the two compared products do
not introduce bias? From your position it would seem to follow that any differences would introduce bias. On the other hand, if you want to say that time of release is the or one of the only differences that would introduce "bias" you've got quite the mountain to climb in order to explain why that is.
Been on the market vs. been on the market: Comparison of the products once both of them have settled into their respective price brackets. Unbiased and can be used for a purchasing decision.
This contradicts your previous statements. If we must compare launch to launch for an "unbiased" opinion then we should continue to compare in temporal succession so as to avoid introducing any imbalance. When the 465 is one month old, we should compare it to the 5830 at one month after release, and so on. In order to be consistent you must either maintain symmetry of comparison or admit that it is not a valid factor here.
Get it now? You're making a mountain out of a molehill; creating a dumb argument where there should be none.
Marginalizing and insulting the position or another person is a pretty reliable indicator of insecurity about your own position.