Honestly? It’s not worth the brain power to spend on this. BC you may, or may not, stack up better than, or worse than, a senator, or congressional slate. One may present their slate principal, or ranked. Or unranked. They may do it one way this year, and another way next year. Candidates may, or may not, be medically, academically or physically qualified. They may, or may not, interview worse or better that you.
There are so many differing scenarios, that I don’t think you can make a generalized assumption that a congressional slate has a better chance of an appointment, than a senatorial slate.
I understand your point, but I don’t think you can make that connection. And in the end, it really doesn’t even matter. Perhaps your congressional slate is presented as a ranked principal slate, and your senatorial ones are presented as unranked competitive. Boom….unless you are the principal, you would seemingly have a better chance on the senatorial ones. Although I personally don’t subscribe to that logic. Bc there are so many unknowns, moving pieces and parts, and intangibles that I don’t feel you can even assign a “statistical chance”. I subscribe to the ‘100 pct chance if you get one, 0 if you don’t’ thinking.
Also team ‘don’t call senators’. They are versed in all the nuances of slate presentation. If they don’t double nom, and they coordinate? That’s their methodology.
There is a lot about this whole process that you simply have no control over. All you can do, is be the best candidate you can be. If you think about all this too much, you can drive yourself bonkers.
Good luck!