Mechanical Speedo Repair Q: Magnets

Want to use a 85 mph M-body speedo to repair a M-body cop unit.

Cop speedo would jump. Thinking it was bushings, thought I'd swap some in. Problem turned out to be a crack in the nylon shaft, causing the magnet arms to wobble enough and contact the field plate cup.

Are the 85-125 magnets the same? Size-wise, they're identical, but could they be diff "strengths".

Pic 1

No PNs anywhere.

Pic 2

It looks identical & I'd be surprised if it wasn't the exact same strength

Same measurements should mean same strength.