Trekking Bars offer a variety of hand positions, but the Existing MTB controls
swap over easily.
drop bars also offer a variety of hand position changes,
but you have to change many parts..

the differences near and far on the same level, versus up and down..

trekking bar's figure 8 bend, offer a continuous curve,
bar end like shapes just part of it.

Ergon GC3 is almost as good as trekking bars, broad flat surface for the grip.