Google local listing VS Bing local listing
 

Which local listing is effective in terms of getting leads or enquiries or from SEO perspective?

Google Local Listing is best but it also matter what country you are targeting for your services in your SEO. In India, Google mostly used by users but outside India, mostly users use Bing Search. So it depends on the target location.

I would say use both

Google is best . If you verify your business.You will rank high.

I would say use both because Both are best for local business listing .

both are the best way to promote your business.