Akai is on this site twice, and the difference between the two pages is what
you intend to do with your hands.
What we found writing the reviews
The MPC pads are the reason the MPK Mini dominates its category. Eight
backlit velocity-sensitive pads with Note Repeat and Full Level is the
interface drum programming actually wants, and nothing about a keyboard
replaces it.
Endless encoders rather than fixed knobs. A conventional knob has a
physical position that stops matching the software when a preset loads, so the
first movement jumps the value. The MPK Mini’s 360-degree encoders send
relative changes, and nothing jumps.
The LPK25 is the honest minimum. Twenty-five keys, octave buttons, a
sustain button, an arpeggiator with clock and eight preset slots — and no pads
or knobs at all. It fits in a laptop bag, which is its entire argument.
The bundles are substantial. MPC Beats, virtual instruments, 2 GB of
content, a Komplete Select bundle and two months of Splice with the MPK Mini.
For a beginner that is more software than most people buy in a year.