how to find out after looking at the ACl that this is router acl and this is port acl.
It depends on where the ACL is applied:
Layer-3 interface (SVI, routed port): Router ACL
Layer-2 interface (physical switch interfaces): Port ACL
is there is any syntax difference between these two acl's?
Both support Standard and Extended ACLs, the Port ACLs support MAC Extended ACLs in addition.
Link: c3560 Configuring Network Security with ACLs
