2 10 kicker cvrs hit alot harder than my 2 12s cvr, the 12s are silver and the 10s are chrome, special model or something?

running the 2 off 1200 watts, any input appreciated, rather run the 12s but the 10s hit harder.

http://www.sonicelectronix.com/item_8360_Kicker-CVR102-07CVR102.html

product history shows the older model specs. the middle symbols are the easiest way to tell which generation they are.

major help, thanks.