Would a 15" rockford T1 outslam (more bass/spl) my alpine 15" type r?

i wouldn't say outslam.... but it would not be very noticeable i would get a T2 that will outslam your 15'' type r.. But if you are looking for outslamming save you money on those and just get a 15'' Cerwin Vega Stroker Pro and that might just make your vehicle fall apart..