Below are responses for your raised queries:
1. What is the difference between "Creo simulate" and "Creo Simulation Live"?
-> Simulation Live yields instantaneous simulation results and thus enables CAD designers to iterate the model and to make decisions with less interruptions
Although Simulation Live covers most of the use cases, Simulate offers a broader range of possibilities and keeps a classic simulation workflow consisting in setting boundary conditions, meshing, solver computing and exploring and tracking results
2. What are the limits for calculation of these two versions?
-> Probably, you may contact PTC Technical Sales team to get the difference in functionality.
3. How many is the cost difference between both versions?
-> Contact your PTC renewal sales representative "Jojo Zou" at "email@example.com"
You can even refer PTC Support article https://www.ptc.com/en/support/article/CS298764 to get more information on Creo Simulation Live. You can use your email Id as user name and forgot password to reset the password if need to log in to the PTC web account.
I think that @rghadge answered correctly your questions an i will go ahead and close this thread.
Don't hesistate to start a new topic if needed.