Sqaull hand's down, ignore my avater while I explain.
First of all even if Cloud were to use his "Knight's of the round table" Squall can easily counter using a GF and even if the GF doesn't get summoned due to lack of speed Squall won't take damage.
Sqaull can then use Eden which can be powered up COMPLETLY OBLITERATING Cloud.
Let's just say Cloud has already put Eden out of the picture all Squall has to do is let Cloud attack him till he goes critical health and use Lionheart HOWEVER Cloud has to wait for enough damage to be done to him so Squall can just not attack Cloud therefore Cloud has no Limit.
Also Squall can use the "Restore" command brining him back to full health.
Now to be Biased: Squall would kick that girl dress wearing freak of nature "Cloud" back to the dirt hole he came from!!!.
Nah just kidding both Cloud and Squall are sound but I still say Squall would win.