Guild Wars 2

So today I was lazy with opening the chests and noticed that the “Chest of the Mist” from the 1-20 daily does not stack with the 21-50 daily. Looking a little closer I noticed a difference in description
1-20: …, a Fractal Encryption Key, ..
21-50: …, two Fractal Encryption Keys, …

is this the only difference in loot from those 2? Anyone got any split data?

Also both chests have “bonus rewards with …” in the description. Anyone know the effect?

21-50 and 51+ have higher chances of better drops and can also drop ascended boxes, which the 1-20 cannot.

The chests used to stack, but the loot improvement patch changed them and made them stop stacking, likely due to the added key.

I don’t know if anyone has done any testing to determine if the other rewards are any different, but it would make sense that the 21-50 chest would have better odds for bonus goodies than the 1-20, as that’s already the case for the Adept/Veteran/Champion chests.