I think the question is not valid because you should not be thinking "winner" if you are hitting from your baseline and opponent has recovered to the center of your possible shots. I think Brad Gilbert would call this a low percentage play. If you have a ball in you wheel house and you are on the baseline, then I suggest think time for an aggressive shot which could be one of many options: 1: Hard and deep with lot s of top CC to get a weak reply (basic shot), 2. Hard and deep DTL with top DTL - especially if this is you opponents weaker side, 3. wide angle top CC - only advise this if you are right up on the baseline and not 3' or more back, 4. short slice to force opponent to hit a low ball.
If you can make contact 3' or more inside the baseline, then start thinking even more aggressively such as winner DTL, approach shot, drop shot, short wide angles, or hard CC drive.
I you are 4.5 or below, I would make 3' inside the baseline your green light to blast. If you are further back, think aggressive shot to put opponent into trouble. But, if you are back and opponent has hit a quality shot, think rally ball to reset the point - go with height and depth.