BTC > any other coin all the times. Ethereum is platform not a coin. You can read about it on Wikipedia but we will concentrate on real stuff. Bitcoin Cash is untrusted by most people. SegWit will be still true Bitcoin, only one and SegWit will help with Bitmain's ASICBoost being taken down. So Bitmain lost his battle on Bitcoin conquer.
My Bitcoin / Bitcoin Cash end-of-year prediction.Segwit2x supporting miners will be "heavily influenced" in the next 90 days NOT to raise blocksize to 2 MB.
Some of them will not. Some of them will want to. The former will keep blocksize to 1 MB. The latter will join to mine the Bitcoin cash fork.
At the end of the year BCH fork will have about half of the BTC hashrate and half of the price.
In numbers it will look something like this:
5000 PH/s for BTC, 2500 PH/s for BCH
$3000 for BTC, $1500 for BCH.