When I bought the B44 it was £280 and the FS2 was about £380 so it was £100 different which is a fair bit when you think that the difference was enough to buy the motor and servo.
It might yet turn out to be a false economy though as if I do make the change then I'm obviously going to lose money on the sale of the B44.1, especially as I have spent several hundred pounds on wheels, tires, wishbones, shock towers, shock rebuild kits, spring sets etc. None of which will be transferable to the FS2....
As you say though, if I do make the change then I will wait for the big bore version in October. That's no so bad though as it gives the B44 another 6 weeks to prove we can get along and work well together. Otherwise she'll be on here for sale to fund the purchase of the FS2.