The difference between T20 and Twenty20
T20 = Twenty20 = T20 League matches (IPL, Bigbash etc) + International T20s
T20I = International T20s
T20I = International T20s
T20 is international match that played between two country. But Twenty20 is leage match just like ipl, bpl, big bash
(T20I) is a form of cricket which is played over 20 overs per side between two national cricket teams. The game is played under the rules of Twenty20 cricket.