I have only got experience with a little lighter rods up to pe6, but same principle applies. It will be very hard, if not impossible, to find a rod that can work a 120g floating stickbait as well as a 150g cup faced popper nicely. Soft tip = floating stickbait, stiff tip = popper
You may still be able to work your 120g floating stickbait and a 150g popper with one rod, but one of the two will not work well.