Hey Mate , welcome to the site. Hope you enjoy and it's lots of fun here...
This is only my opinion what to do. remember with these come's loss of traction round sharp wet corners with too much stick. Plenty of people run them on the street and they are illegal everywhere , but not really easy to detect. Keep your foot out of it for safety. Better than welding.
Mini spools better mate any day but for everyday purposes i highly recommend a tightened up lsd diff with 3.9's or 4:11's any day there lots off fun when you need them and legit too. Mini spool would also void your insurance if you have insurance. Also mini-spools really chew up the tyres and they screech around round about's and corners so cops can tell.
hope this helps.
Modifying a car is like a drug once you start you cannot stop.