I've met one forum member in person who has experience with both doctors. But I'm not sure if I should mention his name? Maybe he will read this and PM you
Giotikas has a nice "package" deal as in he has a driver setup to take people to physio from the hotels, and the physio place has alot of experience from just sheer huge volume of patients. I won't lie, it's a bit crowded though at physio though. And Athens is just not wheelchair friendly if you like exploring the city. Novotel is one of the most popular hotel options (close to the PT center) and the area around it does not look very safe tbh. I did gnail femurs. The right leg clicking at some parts of the journey for gnail- I think if you ask around about this, you'll get an idea for its difficulty/pain level. I know the youtube video on gnail makes it look very easy/painless and it was for part of my journey but I found it much more difficult for 0-2.5 cm and beyond 6cm for the right leg.
I believe that most likely clicking for betzbone is possibly easier (it is less length per click I believe)
But I think Becker may be the better option for alot of people because he has access to a weight bearing tibia nail as well (so he has both a weight bearing option for femur (betzbone 2.0) and also a weight bearing option for tibia (also betzbone 2.0)), so I would consider Becker if you have the money. Giotikas right now has access to weight bearing nail for femurs (gnail for femurs) but I believe he does not have access to a weight bearing tibia nail as of now ever since STRYDE was recalled. I don't know the reason- there do exist weight bearing gnails for tibias in Paris and Milan (used by Jean-Marc Guichet, the creator of gnail) but I believe Dr. Dimitrios Giotikas doesn't use it like that or doesn't have access to it or maybe there are other reasons for this, not sure
The practical result of this is if you want to do fully internal nails for tibias at some point (not external frame) with Giotikas, your option right now will be precise for tibias which is not weight bearing (more time on a wheelchair).
Might be good to find the one forum member here with experience with both doctors and also unrelated to that to read the one betz tibia diary we have (he seems to be having a good experience that is better than the precise tibia patients).
I think they are both amazing doctors, but I vote Becker (better nail options, nicer area, clicking probably easier, ability to stick with one doctor if you want weight bearing for both femur and tibia) if you have the money