Anyway, lets get this back on track shall we?
Emma, you mentioned above about the wattage difference on the Turbopower - the 400w models didn't have the headlight. The 10w difference between the TP Junior and TP hardbag models was the headlight bulb. Motor power is the same, although the TP Juniors tended to have stronger suction due to the cloth bag having a larger exhaust surface area giving greater airflow.
Junior vs. Turbopower? Well, that would certainly be an interesting debate. I suspect that the Turbopower would likely clean slightly better, but the Junior's and Senior's had considerably better build quality over the TP and TM. The TP1 was almost entirely plastic and some of them were VERY flimsey. Certain models have a reputation for being "glass" models and prone to cracking, splitting and shattering (especially the red U2336).
So whilst the TP may clean better, the Junior and Senior were much more solid and could take more abuse.