Darts-70 vrs 69

OK, Sparky, here's my opinion. Admittedly, I am very biased toward the '69 because my first Mopar was a 5-month old '69 340 Swinger and I loved that car. It just had the complete package of looks and performance. I'm still kicking myself for selling that car years ago.
In fact, my desire for another '69 Dart is what made me put my 1 of 3001 '83 15th Anniversary Hurst Olds up for sale. It's going to finance the completion of my 'new' '69 Dart.
I like the basic '70 design, especially with the twin hood scoops, but thought the design was much 'softer' than the 'agressive' look of the '67-'69 body style. IMO, there isn't anything that screams "MUSCLE" like a hemi-scooped '68-'69 Dart with tubs and 'steamroller' rubber - the only thing that comes close is a hemi-scooped '67-'68 Barracuda.
Regarding the '67-'69 Dart styling:
1967 - Didn't care for the front grill. The tail light design was too plain and the backup lights were in the bumper.
1968 - Didn't care for the round fender markers or round turn signals in the front grill when all the other styling was rectangular. I also thought the tail light design was too busy with the 3 sections, and the '68 twin bee stripes were too busy.
1969 - Perfect package of styling. The rectangular fender reflectors and rectangular turn signals in the front grill all echoed the rectangular grill and boxy style of the basic car. The tail light design was much cleaner with with only the single middle bar dividing the tail light into 2 sections. I much preferred the '69 bee stripe design over the '68.
Sorry for being so long-winded, but you asked.