Are the Black Side belly pan/Fender interchangeable between the SBA and RMK?

[Heisenberg]

So my side belly pan that wraps up the side below the side panel on my 2011 SBA ended up getting gouged up in the trailer by the spindle of a sled that decided to move on the way back from west yellowstone. Its not too bad but I am looking at replacing it for resale value down the line. They are about $165 but I found a 2011 RMK being parted out and I could buy the same part for 65. I looked up the part numbers and they have different numbers between the SBA and RMK. Are they in fact different or does polaris just use different numbers for different sleds.

RMK
5438078-070 Fender, LH, Black

Switchback Assault
5437490-070 Fender, LH, Black

 

[assault11]

They are different because of the wider running boards

 

[Heisenberg]

That makes sense. I couldn't figure out why they would be different. Thanks!