Yes and no. Denmark is still going to loose, but the terms are going to be far more reasonable.
There's no way to get around the fact that Prussia could deploy three times as many troops with superior weapons.
It is going to have major and far reaching effects on the army though. One of the more obvious is going to be an infatuation with the individual soldiers firepower. As a result the Army will take to the Machinegun as early as I can justify it and semi-auto rifles will be introduced as the standard infantry long-arm in the 1890ies.
A modified version of this one to be specific
As for the ship itself, I've tried fitting the Swedish guns and three of them will fit, but I'm having trouble with the two beam mounts. I'll probably have to design a simple shielded mount for it. Mounting on as superfiring is out of the question. Even with greatly reduced armour it'll still cause stability problems.
Edit:
A bit of fiddling with the superstructure gained me enough space to fit them all.
_________________
“Close” only counts with horseshoes, hand grenades, and tactical nuclear weapons.
That which does not kill me has made a grave tactical error
Worklist
Source Materiel is always welcome.