Looks like whole-breast might be slightly better for TNBC and other forms of ER- breast cancer. And, it may have fewer complications than partial-breast, which is the opposite of what I would have expected. The study on complications was on women over 67, but researchers compared the effects of whole-breast versus partial-breast, so age should not have been a significant factor. The great majority of women had whole-breast irradiation, so the sample size for partial breast is pretty small, but I am not sure if that is significant in these circumstances.
The study that explains the slightly elevated risk for TNBC patients is here.
And the study on complications is here: