different between insightful vs witty

English

insight +? -ful

insightful (comparative more insightful, superlative most insightful)

From Middle English witty, witti, from Old English witti? (“clever, wise”), equivalent to wit +? -y,See Norwegian Bokmål vettig.

witty (comparative wittier, superlative wittiest)

(obsolete) Wise, having good judgement.
- Then cam there a lady that was a wytty lady, and she seyde playnly unto the Kyng […] that he sholde never be hole but yf that Sir Trystrames wente into the same contrey than the venym came fro, and in that contrey sholde he be holpyn, other ellys never.
(archaic) Possessing a strong intellect or intellectual capacity; intelligent, skilful, ingenious.
Clever; amusingly ingenious.
Full of wit.
Quick of mind; insightful; in possession of wits.

Send