As a candidate, I'd rather get a non-insignificant RSU grant up front, with a vesting schedule that begins day 1, than play the will-I-actually-be-brought-on-full-time game.
Companies have no incentive to bring you on full time, either. They can lie and tell you that you will at the end of the term, but it'll either be met with "we do not need this position anymore" or continual contract extensions because the market is suddenly unfavorable, there's no headcount, or some other excuse.
