Where I am in the Alpi Apuane mountains in Italy you can choose between fitting snow tyres or keeping your normal tyres and carrying chains. Either is acceptable if you get stopped by the police. I always assumed that chains were a cheaper option, but really inconvenient, and that snow tyres were at least as good in terms of performance on snow and certainly a lot less hassle.
If the roads haven't been treated and you are driving on packed snow then perhaps chains perform better than snow tyres. I don't really know. But once the roads are cleared and gritted you have to take the chains off again. So for me the convenience of snow tyres is a real benefit. Especially for that intermediate stage where its not quite packed snow but its not normal driving conditions either and sometimes the road is in a worse state than at other times.
So, I could be convinced that there are occasions when chains absolutely perform better than snow tyres but where I am, the chances are that snow tyres are all you need. And if you are really worried that snow tyres are not enough you could always carry a set of chains as well just in case
If the roads haven't been treated and you are driving on packed snow then perhaps chains perform better than snow tyres. I don't really know. But once the roads are cleared and gritted you have to take the chains off again. So for me the convenience of snow tyres is a real benefit. Especially for that intermediate stage where its not quite packed snow but its not normal driving conditions either and sometimes the road is in a worse state than at other times.
So, I could be convinced that there are occasions when chains absolutely perform better than snow tyres but where I am, the chances are that snow tyres are all you need. And if you are really worried that snow tyres are not enough you could always carry a set of chains as well just in case