Unless you make your own studs from bolts (which is a science in itself) I would say that best on ice is finndubb. Enduro tires for winter work but they flex too much to be taken seriously, you still have alot of fun but the front wash out easily at higher speeds and you have generally less grip. But if you are out to have some fun with your friends they can be more fun than finndubb as you fight more at lower speeds.
i personally use "Monster Mickes" tires, which you only can get where I live. They have enduro studs but are set much deeper and better so they don't flex much. Finndubb is better but when the ice is covered with loose ice/snow which will happen after some time they do have better grip.
Home made studs works too, but if anyone is serious enough to go through that hazzle they just go finndubb. The rest of us just buy enduro studded tires as they are used for enduro (duh) and are still fun on ice.
Another reason that most people here where I live don't go finndubb is that we also race on fields during the winter. Same places as we do the hooning/stubbåker, which then consist of packed snow/ice with snow walls. As there can/will be some dirt after some time you will ruin your expensive finndubb tires. So instead of changing tires all the time or use different sets of wheels most just go for a new good set of studded enduro tires each winter. That set stays on and are used for enduro (normal enduro tracks but covered in snow so you will see stones, dirt, water and roots in addition to snow and ice), field tracks and ice tracks.
Finndubb can only be used on ice and home made screws are not legal to race in enduro competitions.
Finndubb
Endurodubb
Studded enduro tires comes in many shapes and qualities.
Metzeler, Michelin, Mitas, Kenda, Shen shing, Bridgestone, Dunlop to name a few popular brands. Then you have different tires from those manufacturers and different ways how they can have the studs and how many studs... Some people prefer to have less studs on the side of the front tire, or with an angle more down than out to let the front wheel follow the snow track, while others like to have that side grip so the front wheel climb easier so you have more control of where to go.
There are many answers on which set of tires are best (many use different brands back and front) and you will get the definitive answer if you ask the owner over a cup of coffee. Be aware that if another guy joins in a debate might occur and then it's best to silently sip your coffee while slowly backing away. At the end of the day it's the guys that dare to give throttle and brake late who wins.