Being aquitted means you were found not-guilty of the charge(s) made against you, for any number of reasons including technicalities.
Being vindicated is like saying you're sorry for even accusing you of something improper in the first place.
Nah, sorry bubba, but a dictionary *can* be your friend.
vindicated
vin·di·cate
(vĭn′dĭ-kāt′)
tr.v. vin·di·cat·ed,
vin·di·cat·ing,
vin·di·cates
1. To clear of accusation, blame, suspicion, or doubt with supporting arguments or proof: "Our society permits people to sue for libel so that they may vindicate their reputations" (Irving R. Kaufman).
2. To defend, maintain, or insist on the recognition of (one's rights, for example).
3. To demonstrate or prove the value or validity of; justify: The results of the experiment vindicated her optimism.
4. Obsolete To exact revenge for; avenge.