New summer tyres: Increased load index vs. comfort and handling

Hello together, I need new summer tyres for my Phaeton 3.0 V6 TDI 4Motion for spring. My car (and as far as I know all Phaetons with 17 rims) were delivered by VW with Dunlop SportMaxx TT. Since they did their job with me quite ok, I would like to stay with Dunlop, even if the SportMaxx TT rolls off a bit harder and louder than the WinterSport 3D in winter. I need the size 235/55 ZR17 99Y. In this bigger one there is only the SportMaxx TT. D In the meantime, it is relatively old. More modern (and better?) alternative would perhaps be the more current SportMaxx RT2. But this is only available as XL with load capacity 103 instead of 99. What do you think, worsened by the not needed harder flanks comfort or driving behavior? Which tire would you take? Greetings and thanks in advance