I think you should pick based on your primary use case, i.e. whether you are a merchant (stripe) or a marketplace (balanced).
IMO in a couple of years the offerings from these two companies will be so close that this distinction won't matter, but for now they are converging in from different directions so you should choose appropriately.
(I feel this is a lot like Box vs. Dropbox. One started from the team/enterprise side, and the other from the personal/consumer side, but now Box offers free 5GB for personal use, Dropbox offers dropbox for teams etc. A couple of years back, it mattered which one you picked depending on your use case, but these days not so much.)
IMO in a couple of years the offerings from these two companies will be so close that this distinction won't matter, but for now they are converging in from different directions so you should choose appropriately.
(I feel this is a lot like Box vs. Dropbox. One started from the team/enterprise side, and the other from the personal/consumer side, but now Box offers free 5GB for personal use, Dropbox offers dropbox for teams etc. A couple of years back, it mattered which one you picked depending on your use case, but these days not so much.)