Aren't they just the same as MFI flog - go and waste one of their reps time getting them to do plan and ask them to print off a quote (with parts listing) - then go to Howdens and buy it!! Get the Schreiber equivalents though as the carcasses are preassembled - had one in last house and was pretty good.
Howdens and MFI kitchens used to be identical but Howdens sold off MFI in October last year. I think they are continuing to supply some MFI kitchens until next year - but expect to see an increasing difference between their ranges.
As for the planning - it all depends on the individual planner in your branch!