I don't know if one is more reliable than the other. Both should be same assuming they are set up correctly. Clover, however, provides a more native experience, a modern UI, faster boot times, iMessage/iCloud/Facetime support, on-the-fly kext patching for things like SATA, Graphics, Power Management, etc. General consensus is that if you have a newer configuration with a UEFI motherboard, you should choose Clover method. I have been running OSX as my main OS since June and haven't had a single issue. I must admit that I never had any issues with Unibeast + Multibeast before that either. By the way, you can install Clover on top of your current Unibeast + Multibeast system. No need to start all over from scratch.