Phew!!! That's a hard one. Went to the Dormund-concert and will never forget, my entire life.
Think that the SOTT-concerts were tighter in performance, music and show. On the other hand, the Lovesexy-concerts were more playfull and the synergy with the audience was better. The whole crowd wore black or white with polka white or black dots (well the dutch people for the most) The Lovesexy-concert was more of a 'happening' than a concert, the feeling of 'being a part of it' was stronger IMO than during a SOTT-concert
So, I would go for Lovesexy, but I'm a little prejudiced since I never went to a SOTT-concert.