Physically, Taco and Bosa are fairly close. Bosa ran a tad faster. Taco is about 10 pounds heavier with longer arms.
The main difference to me is polish and college production. Bosa had big time production over 3 seasons and was about as polished a college DE as you'll find. Taco needs a good bit of work and only had really good production as a senior.
The good news is upside. Taco, IMO has more with his length and overall physical traits. One of my thoughts on Bosa coming out was that he was so polished coming from an NFL family, that he wasn't going to get a whole lot better in the pros. Some? Sure, but his moves and hand usage were super advanced for college.
Taco will get much, much better with pro coaching and a pro weight room. Also, a scheme like what Dallas plays will benefit him greatly. Less reading and reacting than he did at Michigan and a whole lot more go-get'um.
As for his motor, I'm not overly concerned about that because the team looked into his character and make-up extremely well. If they thought he was just a lazy player, I don't see any way they take him. I don't think that will be a problem... particularly in a rotation.