Which spectra is good? 9s or 9+

S1+ it's hospital grade pump and it really clear my boobs well. I have s9+ too I bring it when I'm out. it's not as good as S1. the difference between s9 and s9+ is one has inbuilt battery which is s9 plus. s9 don't have inbuilt battery you need to find electric point whenever you want to pump