Beautiful sweater!!
It's not universally true that continental is faster. For some people it may be, but I've also seen English knitters go amazingly fast. . My go to method is english, but i taught myself continental for fair isle so I can use both hands and for things like a ribbed scarf. For english I sorta bring the yarn over in one fluid motion which is pretty fast.
I do hate seed stitch though with any method.
