What is the major difference between convertible debt and detachable stock warrants?

Upon exercise of the warrants, the stock involved is restricted and can only be sold by the recipient after a set period of time.

Upon exercise of the warrants, no paid$-$in capital in excess of par can be a part of the transaction.

Upon exercise of the warrants, the stock is held by the company for a defined period of time before it is issued to the warrant holder.

Upon exercise of the warrants, the holder has to pay a certain amount of cash to obtain the shares.