The cossie 2wd pad is a very common shape, no doubt the exact same shape pad on the 4wd is used on others, but compounds differ.
Of course you want to have the same material back and front to keep the brake balance correct, as friction levels vary a lot between pads of even the same maker.
If you find no problem with your brakes, ie you find them good enough for your driving style then stick to what you know, I don't know the price of the oe ones you use, but you may be able to get a better deal on the price of a front and rear set cheaper than just the one set you want, from another supplier.
tabetha