DX55 Fuel/Oil Filter numbers...HELP

[agford4x4]

OK, so i have been trying to find my fuel and oil filters using online parts searches. My tractor is a DX55, 2004 model year.

The numbers i THINK are right came from CASE parts diagrams..

OIL: 87409203
FUEL: 87300042


Now, my question (if the above are correct) is, why does the New Holland tractor take THESE numbers if the engines are the same??

OIL: 86546618
FUEL: 87300041 (i think this is actually the EXACT same filter)

The Oil filters are distinctly different if you try to cross those numbers with WIX online, telling me that they are in fact different.

WHY??? Whats the difference between these filters?

 

[agford4x4]

OK... what i found out...

The new OIl filter number (87409203) replaced the old number of 86402050 which is in fact exactly the same as the NH part number 86546618. Both cross to the same filter on WIX page.

However, the OLD part number crossed to a WIX is 7.49, the new one is 16.99....What's the deal?? Why do much more expensive?