I have both, and generally I prefer the MGC 5
Both are good cubes, but the Dayan is quite kighty, aa in Too Light...
it literally takes a bit more focus and muscle action to move the layers versus the MGC5 because the pieces of the Dayan are sooo light
The Dayan Standard has *really* light magnets which makes the puzzle fairly unstable, and the way Dayan did the slots inside the pieces makes it hard to stack any magnets bigger than 2mm width into the pieces... so anyone who decides to get the Dayan should def get the Strong version imo
...also Dayan used lighter brighter red and orange which (at least for me) can mess up lookqhead and recognition...
I do still get what are, for me, good times on the Nezha, but similar reaults on the MGC 5 dont seem to involve quite as much effort
To me the MGC is the clear winner between the two, esp at ~$15 cheaper