LV and
Gucci are definitely much better in terms of customer service, and since you don’t have a YSL boutique at your home location, getting any repair will likely be a huge nightmare for you.
As for which bag you should get it all depends on what your needs are and your preferences.
I don’t recall LV having a ‘Speedy neo’ so I am guessing you mean a Neonoe? Irregardless of the previous point, all 4 bags you have listed are very different from each other.
If you prefer leather, Speedy B25 is definitely out. If you need space then Alma BB is off. Bigger sized Loulou is more of a day bag while the smaller ones can make the transition from day to night. And if you want something that will stay around (forever) Speedy B25 is the way to go; Loulou, Neonoe might have a chance of being cancelled down the road...
Anyway, all the best in your hunt and hope you get what you really want and need!