Prety much the same, but you can opt between:
- a bank garanty of up to 30k USD for 2 to 3 years (aka frozen bank account for that much money for that much time with NX as benefitiary) or;
- you can sign a promissory note for the same amount of money and time proposed by NX, and your base pay will be decreased appropriatly for that duration (you'll get the money back at the end of the "bond" with 12 months delay)
If you have the money, its better to go with the bank garanty.
As for the min experience, TR is a must (can be with 0H on type) and TT is kind of foggy... but recently there were some applications with 1000+TT, so the more the better.
Cheers.