Whilst I agree that the SATA drive is more likely to be quicker than the other, it's actually impossible to say what one will be quicker for definite with what you've given us. Not all SATA drives are faster than PATA ones...! Have a look at the seek times and suchlike if you've got those figures around, they'll tell you for sure.
If you're building a new PC though, I'd be tempted to rethink on whether to get a new drive. Sounds like you're choosing between two older drives that most likely won't last as long and won't be as fast as a new one, and at £60 for a 1TB drive I know what I'd choose!