The Mycle and Fiido are about the same price. To compare a little, the Mycle has a better control system (KT) and decent branded battery cells (LG/Samsung) both better than the Fiidos. The Fiido battery is bigger at 11.6Ah against the Mycle's at 6.4Ah which is only important if you need the extra range (or will use more assist) that a bigger battery can offer. Most of the other fixtures are very similar (brakes, gearing, mudguards etc).
The Mycle's hanging power cable aside, if the smaller battery is enough for your commute, I'd say the Mycle is the slightly better (and with the KT electronics, slightly nicer to ride) bike of the two.
With all e-bikes around the £1000 mark, it's all a compromise. It depends what features are more important to you, but any 36v/48v e-bike is going to help greatly (avoid 24v "catalogue/Argos/TVWorld" e-bikes) - they won't have the oomph you need).
What is worth considering on a commuting bike is adding decent (additional) lights, and puncture-resistant tyres. The last thing you want to be doing is having to fix a puncture by the roadside in the rain when you're already late for work. I think Estarli offer those (Schwalbe Marathon) as an option which can be fitted from new. I added them too (about £30 a pair) and whilst they aren't 100% puncture-proof, I haven't had a puncture yet.
Good luck.