Literature for microsurgical is abound, and is considered better. If expertise of embolisation is available, you can think of the same as well. Complications of both are to be understood in this context, that there is a marginal risk of recurrence and also of the fact that pain may not resolve after surgery.
Health Tips
A word of caution: B/L Grade I Varicocele is not an absolute indication for surgery. Please talk to your Urologist before planning surgery about the same