true, but the pace that the 6x200’s are run at will be far superior to that which could be achieved over 300m with 2-3mins rec.
With the split runs KitKat advocates 2mins rest between the 200’s which allow better quality runs whilst thwe 300+150 with 30sec-1min is much more race specific. They do split 2’s with 1min rec but also 2x300 with 1min. I think the difference with our training is that it is at race specific paces. One of the quotes I remember from KitKat is something along the lines of…establish your goal race pace and get after it, not too much foreplay. 
We also make sure we don’t neglect pure speed work which I don’t see my collegue at uni doing/mentioning very often. Shall be very interesting to see how the season unfolds and who’s athlete can break 49sec first