one thing my brother in law pointed out is that these wide one piece cutters tend not to cut as well on irregular land (ie, bumpy, not necessarily hilly) since the flexible but individually smaller bat wing sections can conform better.
Also, there is a middle version of the larger cutters, betw the pull types and 3 pt hitch, called "semi-mount". Basically it's my understanding that a SM uses something akin to a "2 pt hitch", that is, no top link but hooked to the 2 side links. I tend to run my BH 1287 that way and it works pretty well. The problem with 3PH for big stuff is that it does not float to the terrain as well, IMHO.
Also, as a dealer recently pointed out to me about a hay rake I was eyeballing (one of those nice very pricey German ones), it does not take as heavy a tractor to run a pull type implement as a similar 3PH one. I suppose that is because of that leverage factor SG & FWJ were "debating" a while back. And if it is pull type, by definition you cannot pick it up with the hitch. Back up off a hillside using a pull type cutter and it will want to flop, I'm guessing. That is if you can back it up, not as easy with a pull type as w/ a 3PH.
I'm still looking for a good used Batwing, nearby preferred of course (VA). The only color I'm trying to avoid is a predominance of RUST.
Jim