The biggest difference is that an SPA is the sale of all shares, and an APA is the sale of selected assets. Therefore, they are both different transactions and have different procedures. 2. With a SPA, all shareholders in the company must be consulted and agree to sell their shares in the company.
A representation is basically an assertion of a past or existing fact, true on the date that it is made. It is generally given to induce another party to enter into a contract. A warranty on the other hand, is similar to a representation but it refers to the present or future i.e. a present or future promise of a fact.
First and foremost, it is typically the buyer's responsibility — not yours as the seller — to draft the Definitive Agreement. This will not begin until both the buyer and the seller sign a Letter of Intent indicating their intention to buy/sell the business.