I have noticed that Spiner is a great physical actor when playing Data. Have you seen this man throw himself to the ground? The absolute best is The Collector episode where he straight up planks, falls face first on a couch and bounces to the ground without even losing his composure.
I've always loved the ridiculous TV show idea that anyone related to you, especially a parent, looks exactly like you so they don't have to cast a new actor.
Although with the Dr. Soong that built Data, plus Lore and B4, it makes more sense.