if you look at them side by side they have the exact same barrel length, at least where the connection is. looks like the whole 12 and 12.5 inch barrel thing is just marketing and they're both either 12 or both 12.5. same with miken being 14 and worth 13.5. both look to have the same length barrel.
jd10 was looking at the tmnt mutant. those are sold out on sis.
Mikens are 14.5" barrels