Filters can fade a bit over time. The light boxes yellow. Bulbs age. A new Kodak standard head should be fairly close to a new Kodak head from a different maker [The US companies use Kodak standard. Durst uses it's own which is slightly different]

Not sure how much or even how exactly you'd use a colour analyzer for this. Really all it should take is a few test prints with the new head. Plus B&W is less sensitive I think then colour printing. So I'm not sure how many people would notice if you're settings were 10 points off. Really if you've got grade 2.6 instead of 2.55 how many will notice?