Yes, of course, but knight's tactics were fairly consistent from the 11th through 15th centuries.
They went from wearing chain and using shields to wearing plate in place of shields. They went from always fighting mounted to regularly dismounting to fight on foot. Swords when from slashing weapons meant for mounted combat against light troops to thrusting weapons meant to piece weak points at the joints of plate. Much larger two handed varieties for anti-cavalry fighting appeared. Pikes, crossbows, and longbows, in their infantry opponents were all introduced and perfected after the one and before the other. The battle of Hastings and the battle of Agincourt were not the same.
Even if the swords were closely proportionate to the user's height when new, they might well tend to become shortened over time due to regrinding to remove battle damage.