Cross Country Spike- Nike Zoom victory XC- What size Should i get?

I am looking into getting the Nike Zoom Victory XC spike for this season yet dont know which size. In the spring for track I had run with the Nike Matumbo's at a size of 10.5 and recently tried them on and they seem to be pretty tight. Since these are cross country spikes I would like them to be a little tight but not as tight as the 10.5 matumbos are on me now. Do these run small or big or anything that I should know about. So basically my question is that should I stay down with the tight 10.5 or move up to a size of 11 for these XC Victorys