yep questions like that are hard to answer, if they weren't there'd be a widely shared resource covering them in detail. as mentioned it depends on your playing style, and you can't filter out jackpot rake in HEM, it's hard to 100% avoid party BBJ tables, so that skews even huge data samples like PTR's site rake analysis
long story short if you actually play/search this thread/PTR regs/do the math yourself, you'll find that below 5/10 LHE rake is sick high on party, ~1BB/100 more, many of the best regs are breakeven over huge samples, it's hard to beat even with a 60/5 fish at the table
also palladium level, $50 rake/day, is pretty much = supernova, not sure why you are comparing it to stars platinum star
JH1's recent spreadsheet has excellent info for stars, which is easier to compile as there are no BBJ tables, you could use that, go play 10k hands at every stake on party and get back to us with us a comparison if you like