yeah the 3003 is different, bigger coil, dual spiders, twice the magnet.. also 1 of the reasons they are so cheap is they only come in 12" d4., no 10's or 15's or d2 or svc 4ohm so they probably order 100,000 at a time for like $15 each or something crazy low.. pretty sure it's a japan sub not china.. just saying peeps getting 2 cheap 10's for $120 or something could get 1 of these and probably put more power to it and they take small boxes.. i had 2 old old model ones called "5 bullet cones" sealed with 600rms total and after 4 yrs of free subs from stereo shop (memphis orion etc) the installer said "u know the best sounding subs u ever had were the pioneers".. they were 400rms 2" coil i think, found only this 1 pic online
https://imgur.com/k0NKQQj