(NOTE: I've had to edit this quite a bit as originally posted reply was wrongly stated
; sorry about that and any confusion it created)
Difference between LINE and MIC (best set in LOW sensitivity) inputs is ~17 dB on most minidecks. Than means you lose ~17 dB (quite a significant drop) with LINE verses higher gain MIC input modes.
For this reason using LINE gives you a ton more headroom against clipping with high output mics recording moderate to extremely loud venues.
So if usually recording LINE input, consider where you are now setting the REC level adjustment (assuming you are in MANUAL adjust mode) and figure if at ~1/3 to the maximum adjustment setting with only slightly low to full scale VU readings, going to MIC input (LOW ONLY please) MIGHT NOT WORK OK for getting too much signal into the deck's mic ~17 db 1st gain stage.
However, if using the LINE input with your usual mics/venue, and adjustment is needing to be set
at top of full adjustment range and still having the VU indications only
peaking at or below -6 to -12 dB, then you
might chance using the MIC input.
Of course going to mic input is a tact you hope doesn't clip the first stage (which gives no indication of clip distortion as the VU levels can be set to look OK at least if using a MD deck), but any excessive (usually the bass signals) will sound slightly distorted-to-awful when playing back later.