From what info I have dug up, both are "good" lenses.Of course the reality is you have to know at what settings each lens can perform optimally.
First 105 f2 dc: This are screw drive autofocus? Don't know if it has been updated for cameras without screw drive. Test report indicate vigneting at F2.Read for yourself whether it is still acceptable or not.Things will get better when you stop down? If you already have 85mm then people say it's similar? Got money not a problem right?
135mm f2 DC: Screw drive.. If using FF like D700 then a longer reach for street is better? People are shy? Another view is if you are not close then it is not close enough for street? Some say gorgeous bokeh..both lenses can focus close 105= 0.9M , 135= 1.1M so good
for children? PS i believe vignetting at F2 is less?