Confusing Cousins: Criminal Conspiracy and Abetment

Maine AP LAWCET ka exam dekha hai, lekin yeh do concepts mujhe confuse kar rahe hain. Criminal conspiracy aur abetment mein kya farq hai? Ye dono hain IPC ke under, par mujhe lagta hai ki yeh ek dusre kaa duplicate version hai. Criminal conspiracy ke under, agar 2+ log hain jo common intention ke saath karne wale crime ki planning karte hain, to sabko punish kiya ja sakta hai. Par abetment ke under, agar koi individual dusre ko karne ke liye utsaahit karta hai, to uske liye bhi punish kiya ja sakta hai. Kyaa ye dono hi hain hi sahi hai? Ya phir 2 different situations haien? Please help, mujhe ye samajh nahi aaya.