Bifrost multibit vs gungnir multibit

Please redirect me if this has been discussed elsewhere, but I haven’t found it if it’s so. Has anyone experience or knowledge of the advantages of the Schiit Gungnir multibit over the Bifrost multibit other than the propriety clock in the Gungnir?  A friend lent me his Modi multibit, and I became interested in possibly getting one of the Schiit DACs. The Yiggy is beyond what I want to spend, besides the reviews I’ve read here indicating that the Gungnir is a bit mellower sounding, which is more to my preference. Here’s the rig for background:
Yamaha CD-s2100 Sacd player 
Sonic Frontiers Line-1 preamp
Parasound JC-1 monos
Triangle Volante 260 speakers
B&W ASW650 subwoofer

i also have an Arcam rDac that I’ve read on threads here may have a “multibit-like” sound, and I’m doing comparisons this evening with the Sabre DAC in the Yamaha. So far the Sabre is winning, but I didn’t compare the rDac with the Modi when I had it.  I hadn’t known at the time about the possible similarities between the two DACs. 
Any info opinions and or experiences welcome, thanks in advance,

Dave