Now my little one is 9 months old we are venturing further afield and our Silver Cross Pioneer is not perhaps the best chair for this. Looking at off road pushchairs it seems the Mountain Buggy Terrain and Out n About Nipper V4 are very off road focused. Are there any significant differences between the two, there is a price difference so wondered if the performance is different. Looking to use it walking the Chilterns and Cotswolds walks etc.