Two 12-month-old infants, Alex and Ben, are observed during playtime. Alex frequently points at toys he wants, shakes his head to refuse a snack, and waves when his caregiver leaves the room. Ben, on the other hand, rarely uses these types of movements and primarily communicates by crying or fussing. Based on the typical relationship between early non-verbal and later verbal communication, what is the most likely prediction about their development at 24 months?