That doesn't have friction mode, which IMHO a very important choice, especially if your derailleur hanger is bent a bit and the gear go out of sync.
(To answer your question, they work, but not with 10spd MTB derailleur, 9 speed MTB one is recommended).
Ah bummer. My derailleur is 9s.
Still work.
8/9/10 have same cable pull*, I ran an 8 speed derailleur once because my 10 speed one broke.
*new MTB 10spd have different pull, new Tiagra 4700 too).
@Heldring started
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That doesn't have friction mode, which IMHO a very important choice, especially if your derailleur hanger is bent a bit and the gear go out of sync.
(To answer your question, they work, but not with 10spd MTB derailleur, 9 speed MTB one is recommended).