Thought it's quite an interesting discussion at the moment.
Let's see the results:
Dimitrov 3, Thiem 1
Both have a slam SF. Thiem has 1 master SF and 1 F. Dimitrov has a masters title though.
Race to London:
For me I'll give the edge to Dimitrov, he's better on HC and the better part of this season is coming. However I must admit Thiem produced higher level of tennis overall, but didn't win masters because of ClayDal and Djokovic playing his best match. You could say he just peaked on the wrong surface.
Really? Cause I didn't see Thiem playing a full tournament with the level Dimitrov showed in AO or Cincy. Thiem was great against Nadal in Rome though.
As for your question, Dimitrov should finish higher, he's better than Thiem on outdoor hard and way better indoors. But who knows with him, he can also go to the USO and lose R1 to Benoit Paire.
PS I think Dimitrov has 3060 points, not 3160.