DS9 s2e26 The Jem’Hadar
The cop-out explanation from Memory Alpha:
Only one Vorta was demonstrated using telekinesis: Eris. As the DS9 writing staff put more thought into the Vorta following their initial appearance in “The Jem’Hadar”, telekinesis was discarded and deemed a misstep that the writing team hoped viewers would forget. (Star Trek: Deep Space Nine Companion, p. 155) Ronald D. Moore stated, “Our internal rationale has been that Eris was given this ability for a specific purpose by the Founders (and maybe several other Vorta along with her) and that it is not a normal part of the Vorta ‘recipe’ in the Dominion.” (AOL chat, 1998) However, on an earlier occasion, Moore stated that other Vorta “presumably” had the ability, but no situations in which it would manifest had come up. (AOL chat, 1998)
Only Romulans from the Northern Province have strong V-shaped brow-ridges.
Only Klingons from the Northern Province have a claw coming out of the top of their feet.
Only Trill symbionts from the Northern Province can blend with humans and take over their body entirely.
Only Trill humanoids from the Northern Province have strong V-shaped brow-ridges and no spots.
Only Cardassians from the Northern Province grow moustaches.
Only Vorta from the Northern Province can do the energy-ball thing.
Only telekinetic Vorta come from the Gamma Quadrant, otherwise they’re just sparkling Vorta.