almost 3 years ago - Shurenai - Direct link
Equipped mods matter. Every additional mod is a 15% boost to the primary attribute of the tool; in the case of a pickaxe, that would be Block Damage.

Q5 items have 3 mod slots.
Q6 items have 4 mod slots.

So, modded out, Your Q5 would have 136.3 block damage, and your Q6 would have 148.8; And thats before accounting for additional effects the mod provides aside from the baseline boost- Such as bonus damage to stone, or iron, or added durability.

And given that the pickaxe's primary purpose is block damage, your Q6 is definitely superior.