It's great you're looking into ABA and ESDM! Both therapies can lead to significant improvements for children with autism. Research suggests that after 6 months to 2 years of intervention, both ABA (Applied Behavior Analysis) and ESDM (Early Start Denver Model) show improvements in areas like cognition, language, social skills, and adaptive behavior.

One study indicated ESDM might lead to greater gains in social reciprocity, while ABA may show more progress in gross motor skills. Other studies suggest ESDM can result in IQ gains and better language skills. It's often recommended to personalize the approach, using ESDM for social and communication focus and ABA for behavior and adaptive skills. Starting early, ideally between 18-30 months, and engaging in intensive programs can also maximize outcomes.