From my knowledge of it they are all relatively the same. The flared ports are supposed to reduce port noise. I have a slot port and I don't have any port noise at all, so it is all preference I think.
The advantage to aeros is that it is very easy to add port length when it is needed.To adjust port length on a slot ported box it requires much more work.
a main convenience of pipe/aeros over slot is that the box is smaller & u can adjust the tuning by removing the pipes & sticking it back but a slot is a permanent box which u cant adjust ......