Saying “instead of” in cantonese
Instead of =  代替; 而不是

[use(A) instead of (B)] = [use (A) 代替/ substitute (B)]
or
[use(A) instead of (B)] = [use (A) 而不是/ but not (B)]
Example:
Use carrot instead of stick = 用利誘代替威逼; 用利誘而不是(用)威逼
Use John instead of Peter = 用約翰代替彼得; 用約翰而不是(用)彼得
kill John instead of Peter = 殺約翰而不是(殺)彼得

Cantonese:
用利誘而唔係(用)威逼
殺約翰而唔係(殺)彼得

~

&quot;pay me in Canadian dollar instead of Hong kong dollar&quot; in Cantonese
用加幣代替(用)港元付款(俾我); 用加幣而唔係(用)港元付款(俾我)
words in () are optional

You are correct, '不如' means 'better off'. It is different from &quot;instead of&quot;. &quot;用利誘(不如)用威逼&quot; means &quot;(better off) use stick than use carrot&quot;