[Gazeofslate]

Just noticed that one of my tomato plant -a white fruited variety- seems to have some kind of leaf disease. Does it look familiar to anyone ? I don't really know what this could be... Septoria leaf spot ? Some kind of nutrients deficiency ? Fungal disease ?

Oddly enough, a second plant grows in the same pot and is healthy as can be. Then again that second plant is a green tiger plant and for some reason this variety seems to do really well for me, it looks sickly because of the wispy leaves but shakes off about any disease. Out of the three varieties I'm growing this year, it's the only one that didn't show any kind of disease.