Seedorf was technically far superior to Gini, much as I like Gini. Superlative technique is something you can rely upon well into your 30s even as your body declines. Not sure Gini can.
I think he can play for a long time in Serie A. A 35 year old Ashley Young made 18 appearances for the team which came second in half a season. 39 year old Zlatan just scored 10 goals. As long as he is not affected by injuries, I can see him play 4-5 years in Serie A.