Two rabbit in a 150 is asking fore trouble.
It can be done but both need to be small and introduced together at the same time after they have been in QT together in one tank.
Even so after a few years when the grow they might get the fox and rabbit game on.
Although not a direct comparison, and for what it's worth, I had two one-spots together in a 120g. Everything was peaches and cream for about a year and a half. Then one day, one decided it was tired of its tank mate. I ended up having to remove the aggressor.