~* OR LIKE?

I have a query that I could run a number of ways:
Like this:

  index_word.word ~*'radio.*'
  OR
  index_word.word ~*'spry.*'

Or I could use LIKE and the "%" comparison

If I toss out the need for comparisions I could just use: IN
('radio','spry')

What's the relative performance for:  "IN" "LIKE" or "~*"? I'm trying to
decide if the performance loss of doing extra string compares is worth
getting slighly more relevant results.

Matt Friedman