Are Vortec and LS Motors the same?

Related questions

1. What are the different types of LS engines?
2. What LS size means?
3. What size motor is a 5.3 L?
4. Are ls3 heads Cathedral Port?
5. Is a 5.7 Vortec an LS?
6. What does LS mean for engines?
7. How much HP does a 5.3 LS have?
8. Whats the difference between ls1 and ls2?
9. What does LS swap mean?
10. What is a LS relationship?

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17. #heads
18. #intake
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21. #exact
22. #manifolds
23. #different
24. #camshafts