You will need 10 rock boots and maybe 11 if you use really thick socks, bunting, or two pair as I often do. Size 10 rock boots equal turtle fins fitting perfectly or XXL jets fitting a little loose but I like them that way. XL Jets will be too small. I repeat, XL Jets will be too small. BTW, I have the same size shoe and already went through the whole Jets sizing thing. Even my wife's size 8 rock boot was a little tight with XL Jets. Now, XL SPLIT Jets will be perfect with 10-11 rock boots. Check out kidspot's excellent "boots/sizing with Jets post"...Do a search...good luck!
One other thing...you might want to try on a pair of the bare trek boots. With those you may be able to keep your XL Jets as the trek boots are a bit smaller than the rock boots.