Re: OTB vs K7 cooking area..
I hear that sort of thing happens sometimes.
NOW I get it - didn't realize someone said a K7 was bigger than OTB. Hmm. Why would someone go and say a thing like that?
Someone DID make a nasty sound, once, about how it's harder to flip stuff in the OTB, because it's several inches below the lip of the cooker. I can see that, maybe, with a pizza, but since you have an upper grill, the pizza sits on that, well ABOVE lip level. (not to be confused with mouth level, of course)
Other stuff, not a problem. Plenty of room to flip things, using tongs or spatula. As for roast meats, I think it's nice not to have your roast banging against the insides of the lid, or the back of the thermometer. But that's just me.