It's perhaps worth noting that the services offered by Nomad-Crete Express and Greengibble are slightly different from Anglo Greek. Anglo Greek are a freight forwarder. That means that they use a variety of carriers and your parcel moves from depot to depot across Europe being offloaded and reloaded onto different trucks, a bit like a courier service. Crete Express and Greengibble do point to point delivery where your parcel gets loaded onto their truck at their depot and then offloaded at their depot at the other end. That might be a consideration if the thing being delivered is particularly fragile?
From the user point of view there isn't a lot of difference. You get the parcel to the depot at one end and pick it up from the depot at the other end. In the case of Anglo Greek it will be delivered to your door at no extra cost. With Crete Express, and I guess with Greengibble although I don't know for sure, it is extra to get home delivery.
Note also that, in the case of Anglo Greek, the depot you deliver to is not usually their depot and may vary so make sure you get the correct address each time.