External dimensions and fit are easy for the parts counterman to match up. I'm sure he's glad to take your money and move merchandise through his store. However, the pressure calibration for when the switch activates can't be verified by simple visual comparisons.
Does your new switch activate at 2 PSI, 5 PSI, 10 PSI, or 20 PSI?
Were it me, I'd stick to the Honda switch so the system will work as intended. I think the extra $20 is worth it.
Good luck!