What is the difference between a Crossed cheque and A/C Payee cheque?

Before we understand the difference between the Crossed cheque and A/C Payee cheque, it is necessary to understand the concept of Endorsements
The section 15 of the Negotiable Instruments Act 1881 defines endorsing as "signing on the face or an instrument for the purpose of negotiating a negotiable instrument (such as Cheque). "

A person who signs the cheque and transfers the instrument is an endorser and in whose favor it is transferred is endorsee. The endorsee acquires a right to negotiate the instrument to anyone he / she likes. By making an endorsement the endorser promises that in case of dishonor, he / she provides a guarantee to compensate the holder.
Crossing a cheque by making two parallel lines with or without such words as ___& company is general crossing. Section 126 of the NI Act says that this is a direction to the bank to not to pay the cheque across the counter.
This crossed cheque is no more a bearer cheque where anyone can negotiate and get payment across the counter.
In case of a crossed cheque, the payee is free to make further endorsements. For example , Ayesha receives a check from Rohan which has been crossed, Ayesha can get this payment in her account only and not across the counter. But in this case Ayesha is free to endorse the cheque in favor of Suresh and further Suresh is free to endorse the instrument in favor of Mukesh and so on...This means that crossing a cheque does not put restrictions on endorsements. In case the cheque gets dishonored, Mukesh can sue Suresh and Suresh can sue Ayesha and Ayesh can sue Rohan.

Now lets discuss A/C Payee cheques. The NI act does not talk about the A/C payee crossing. There is no definition of A/C payee crossing in the NI act and it is a child of banking practice. Making a cheque A/C Payee is a result of custom, use and practice and is now accepted legally.
But, the A/C payee cheque cannot be further endorsed. This means that if the cheque in the above example which is in favor of Ayesha bears "A/C Payee", payment can be collected in Ayesha's account only. The paying bank makes sure that amount is being credited to the account of the payee only.