[tarikjn]

Sorry but there is no comparaison, Europe has 25 countries with different immigration laws from which you can pretty much choose from depending on what options you are open to.

Take Germany specifically, they have a "Blue Card" (which I believe is available in other EU countries as well) which you can get automatically if you have a degree and a job offer. It converts automatically to residency and eventually citizenship over times depending on the country.

That is a very, very far cry from what H1-B are, and even TN visas.

For H1-B you need a sponsor waiting for you, you need to wait up to ~11 months to know if you are lucky to get through the quota and be allowed to work, an H1-B application is typically 100 pages thick and cost $3 to $8k of lawyer fees and $2k of gov fees (your application gets sent back to you if quotas are reached).

TN/H1-B don't convert to green cards by themselves, your employer need to be willing to go through a lengthly, costly process that takes 2 or more years to get you a green card (that is once you have gone trough all the trouble of getting a H1-B), which many employers will be unwilling to do if you have time left on your 6 years H1-B limit, and you have to stay with the same employer during all that time.