I don't know, as Iv'e never compared the two together (reason being iv'e never thought to and I don't use my Junior much anyway.) To be honest ill'd say the Turbopower would clean better. Better suction etc.
Yep, all Juniors are dirty fan (I prefer saying fan, call it what you want doesn't bother me) same as the Turbopower ones. The Turbopower ones have a 7 bladed plastic fan and the Juniors have a 7 bladed metal fan. Although some models do have a plastic fan (not sure what models)
The Juniors have a 250 watt motor while some have a 300 watt motor which is slightly different in pitch a bit hard to explain.
The Juniors have two metal beater bars and two replaceable brush strips and take H1 bags. The 300 watt models have flat belts (anyone reading feel free to correct me) while the others have a rounded belt.
The Turbopowers have a plastic brushroll with non replaceable bristles and have "pads" which beat out in bedded grit (see what I did there

) The Turbopower ones also take H4 bags.
When Iv'e sorted out the carbon brushes in my Junior ill do a comparison video if you would like (not sure when it'll be though)
I'll also send pictures of the fans,brushrolls etc via Facebook soon. If you can get this one (or any junior) I suggest you do, you'll love it. They do have a short cord though and short handle (for me)
Also nearly forgot to add ~ The Turbopowers have different wattage motors (depending on model) For example - the U1100 has a 400 watt motor, the U2332 has a 410 watt motor and the U2716,U2718,U2602 and so forth have a 575 watt motor. Some models have a 600 watt motor (can't remember the model numbers though) anyway ~
Hope this helped.