Yes, you should still be able to throttle back at times to conserve battery juice. The main difference you will notice is that you will have to have the throttle up a little higher on the stick, but it basically all balances out, since the prop. will be a bit smaller and most likely pull less amps than the 9x7. Your flight times will be relatively close to what you are getting now, they should be a tad longer due to less current draw.