There IS a crucial difference between "rather than" and "instead of" that you should know. "Rather than" is a conjunction and so can be followed by basically anything, whereas "instead of" is a (complex) preposition -- and a preposition should be followed only by a noun.
Refer the below links:http://www.manhattangmat.com/forums/rat ... t1177.htmlhttp://gmat-grammar.blogspot.com/2006/0 ... ad-of.html
I read that - GMAT prefers "rather than" over "instead of"
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