FWIW there is 5/8th of SFA differance between the specs of all of the lawn mower filters which when you think about it should be no surprise.
The major difference is the size of he can itself.
Just about all of them will interchange
The only real caveat on that is the thread which may be metric 20mm ( Honda, Kubota, & some Loncins ) or Unified 3/4 .
After that they are all between 20 & 30 micron which if you know about filter media means they could all be the same paper.
All have Anti syphon valves and all have a pressure relief between 8 & 15 psi but you would have to run your mower 100% rich for 10 year to totally fill a filter to the point of blockage & the bypass opening.
If you plug the Toro number into Stens web site you come up with these specs
If you plug those numbers into the Rotary web catalogue you get the same specs & funny enough Prime Line is the same as well..
- Thread 3/4"-16
- OD2 11/16"
- Height 3"
- Micron 25
- Made ByAn OEM Supplier
- 9-12 PSI pressure relief
- Anti-drain valve
- Package of 12 of 120-634 oil filters
- Priced per pack, sold per pack
- Made in USA
- However I usually fit a Briggs long to everything where it will physically fit because I buy them by the gross ( 144 filters ) and get them very cheap