Newer style injector?

[ianshannon97]

Anyone else order injectors for their car and notice the design is different
than the ones you pulled out? BigPepNYC gave me one to replace one of my
broken ones and although the seals and the overall size is the same the screen
is lower on the newer injector and the bottom by the nozzle does not have a
rounded cover but a prong like a Bosch +4 plug?. Dealer told him this was an
updated injector. Anyone else notice this? Also they are mixed old and new.
That should not be a problem?

91 NX2000 with work.
97 Maxima SE, smooth and powerful automatic
http://www.angelfire.com/ny/ianjiggyroom/IansNX2000page.html