Assuming that they are both Porsche's.
What if one is a 2006 Lamborghini (Luongo) and the other a 2011 Porsche (Schneider)? And what if you saw the 2014 Porsche model (Lack/Cannata) and you really like how it's coming along, and you think that the 2006 Lamborghini can perform at a top level well past when the 2014 Porsche is ready for the market?
Schneider is not and will never be in the same conversation as Luongo. With Luongo, we're talking a goaltender who is likely to be top 3 in all-time wins when all is said and done. Schneider? He hasn't even played a full season as a starter, and he's already 26. Also, Luongo will be dominant past the time Lack or Cannata are ready, and these two look just as poised as Schneider and look to be taking the same career path.
To be honest, goaltenders like Schneider are plenty in this league - develop in the minors long, play well positionally and mature later to become a starter - Jimmy Howard, Brian Elliott, Mike Smith, Craig Anderson, etc. Both Lack and Cannata are doing similar things as Schneider right now. We can develop another Schneider before Luongo is no longer dominant. But it is rare to have an elite goaltender who will dominate well into his late 30s like Luongo. NJ and VAN have it, LA and MTL will have it. Others look in envy.
I am happy to do business with someone who misjudges their asset and sells me a Lamborghini for the price of a Porsche instead of the Porsche any day of my life. Sad thing is, you might be getting rid of that Porsche anyways in 4-5 years when the new Porsche comes out.
Meanwhile, I plan to ride out supreme quality that will last - that's what we have in Luongo.
You ditch the Lamborgorhini, everyone knows they have way too much maintainence