That is not true for all cars. At some point they stopped using motors with different wattages at least on certain cars. My car, a May '95 9c1, has 2 identical 100W motors.
Just offering yours may have been potential victim of a little clandestine swapping at a garage. But, in your defense if you look at the pic illustrations on the AZ site they ALMOST look like they're showing the same sized motors for both sides.
I just picked up what is supposedly (but falsely)
listed as the replacement for my Cady's secondary fan. Counter to 5 decades worth of experience I neglected to take the old one in to compare at the counter. But in my defense the listing was pretty dam clear and straightforward and matched the number from the other linked thread ----- so my radar was down:
1995 Cadillac Fleetwood Brougham 5.7L SFI OHV 8cylVDO/Radiator Fan Motor,
Part Number: PM540 Fits Your Vehicle
VDO/Radiator Fan Motor
Application: Driver side
Without heavy duty cooling
There's two other options listed: the "passenger side" with a different part #, different price and different picture. And, there's something listed for "with heavy duty cooling", with a different part #, different price and different picture. Never mind there's no such thing as an electric fan for the belt-driven mech. fan with the towing package for our cars, which is what I figured was a simple flub-up.
Well, it turns out I DO
have what's labeled "heavy duty cooling" since that's the fan I need:
VDO/Radiator Fan Motor
Part Number: PM9040
Warranty: Limited Lifetime
Application: With heavy duty cooling
Notes: O.E.M. #22137220
It turns out my SS has this so-called "heavy duty cooling" on the driver's side too.
It obviously has nothing to do with a towing package. The motors on both cars are physically different side-to-side and no way close to the same mounting, in line with what Fred said. I hope this saves the OP and others a little aggravation someday.
Rock Auto will have the right one here Tuesday.
\'96SS SOB: SSRI, Herter Tune, Tri-Y II, , 3000 Edge, F/HO bars, METCO extendeds with CV MMC, Bilsteins, currently Vredestein Ultrac Sessanta (315/35 rear). Finally, wait for it... LT-4 knock module!
\'96FWB BUW-Butt Ugly White: PCMPerformance tune, HDFA w/ swissed filter, 1/2 SLP s.s. catback with H- and Flow Super 50s, oem opti rebuilt 3 times, SS Bars, METCO LCA, Airlift 1000, Monroe SS, PowerTrax No-Slip, CTS wheels with +1 rubber. Finally, yes again... LT-4 knock module!