MBaehr, in this FL range I would not give too much about optical ratings, or fine differences between the two lenses.
I had the Sigma sports version with additional (longer) foot and went to Tamron G2. Biggest reason was, it's rather tiring to use the Sports without tripod/gimbal. Other differences are little details. Such as lighter lenshood, FL lock at all FLs, the Tamron is cheaper but comes already with an ArcaSwiss type dovetail. I can remove the collar and really use the lens handheld.
No big difference (I see) in optical performance. In optimal conditions the Sports might be better - but very often it's the camera's AF system which makes a differences between a good and an average shot. Very often the light conditions are not that great in Northern Europe. You need fast shutter speed and not too high ISO? Then you need a lot of sunlight to get great results. I just want to damp your expectations - an old APS-C body has an old AF system and a less than state of the art noise performance. If the results are not what you were hoping for, don't blame the lens only.
I had the Sigma sports version with additional (longer) foot and went to Tamron G2. Biggest reason was, it's rather tiring to use the Sports without tripod/gimbal. Other differences are little details. Such as lighter lenshood, FL lock at all FLs, the Tamron is cheaper but comes already with an ArcaSwiss type dovetail. I can remove the collar and really use the lens handheld.
No big difference (I see) in optical performance. In optimal conditions the Sports might be better - but very often it's the camera's AF system which makes a differences between a good and an average shot. Very often the light conditions are not that great in Northern Europe. You need fast shutter speed and not too high ISO? Then you need a lot of sunlight to get great results. I just want to damp your expectations - an old APS-C body has an old AF system and a less than state of the art noise performance. If the results are not what you were hoping for, don't blame the lens only.