1) I mean the size of field armies, some examples
Oudenarde
Allies: 85 Bns, 155 Sqns, 110 guns (around 80.000)
French: 90 bns, 170 Sqns, 80 guns (around 80.000)
Malplaquet
Allies: 128 Bns, 253 Sqns, 110 guns (around 110.000)
French: 96 Bns, 180 Sqns, 60 guns (around 80.000)
2) From A. Konstam, Poltava 1709 in Osprey, I learn that up to 1/3 of the infantry still were pikemen! and that the standard tactic was to fire 2 volleys while advancing, and then close charge the enmy. It doesn´t sound very sophisticated, all that was required for that was good discipline and high morale. That simple straightforward tactic could be devastating against poorly disciplined troops, but it seems to me it would be suicidal against the armies of Marlborough or Villars.
On the other hand, english infantry advanced creating a rolling fire, firing by platoons. To achive this a high level of training was required.
3) The Swedish army also did little use of guns, in general it looks like it lacked firepower when comparing to the English and French armies
4) Swedish cavalry, AFAIK, was deployed in the wings, while English and French were used to deploy it interspaced with inf to support each other, combined arms .
5)In 1707 Marlborough visited Charles XII at Altranstadt, Chandler says that "The Duke was not overly impressed by what he had seen of the Swedish army´s administrative arrangements" although he doesn´t say where he found this. It is the only "comparative" I can recall