No need to choose. I own both HUT8 and HIVE. Hive has always focused on Ethereum. To be fair, HUT8 has also given notice they are going to start mining ethereum, too. HUT8 also made a smart move when it bought a pile of bitcoin a while back. That pile has paid off for their SP.
Hut8 may be seeing the beginning of a good run. HiVE really hasn't started yet, but it will happen as it just put out outstanding earnings. Both of these Canadian miners have managed the roller-coaster well and are beginning to make a consistent profit. Another 6 quarters of profit and these companies will be seen by the analysts who are the gatekeepers for the institutions.