My PVR9300 had slo-mo, sadly missing from the 4000T (just like the info button and other great features like alphabetic view of schedules and recordings, editing of recordings etc !).
The 4000T is a great step forward with 3 tuners and its media server capability, the two main reasons I bought one but in other ways the UI implementation is very poor, compared with the 9300. The search feature is fairly good but does not seem to search within the catch up programs so black mark for this (see no reason why this can not be done), Demand 5 is not integrated with catch up and UKTVPLAY App is missing altogether so no catch up for Dave channel etc