Hello all you clever people.

Help. I stripped the carbs on my mc28 and found that the carb needles have different numbers stamped on them.
The right hand one has number J8 MA
The left one J8 LA.
Is this correct and what is the difference between them ?
The left cylinder does sound quieter at low throttle openings [tickover to 1/4 throttle]. Could the two things be related ?

Answers eagerly awaited

Headman