Pretty sure you are incorrect regarding the prices for old style Vs new style replacement OEM carbs. Both are available at Partzilla and both are the same price, $287.
Either carb can be fit on your bike but if you go with the new style you have to also buy the intake joint between the cylinder head and carb and maybe even the air box boot and then you have to reroute the throttle cables. IMO, there is no real benefit in changing the carb to the newer style other than parts remaining available for the new one longer.
There are very cheap Chinese carbs that apparently can be fitted in but I have never swapped one.