The right chop mode depends on the material: transient for drums, beats for even loops, regions for unbarred audio, manual for uneven cuts
Slice tools offer several modes, and choosing well depends on the source. Manual mode drops slice points on the fly while listening — best when you want uneven divisions or already know where the cuts go. Transient/Detect mode auto-slices at hit points — best for cutting drums into individual hits. Beats mode (BPM on MPC, Grid on Maschine) uses musical timing values, assuming an evenly cut loop. Regions/Split mode cuts into an arbitrary number of equal sections within a chosen start/end — best for isolating a section of a longer recording that is not cut to bars. Matching mode to material saves cleanup work later.
Examples
Use Transient on a tight drum break; Beats mode on a bar-length loop of known tempo; Regions to grab a phrase from an unbarred field recording; Manual to cut a vocal into uneven words.
Assessment
Given a source (drum break, even bar-loop, unbarred recording, uneven phrase), pick the appropriate chop mode and justify the choice.