I have used the RA Vecta for a couple of years now with 2 16mm bands and never had a problem with the trigger. I know there was some issues with the trigger and safety sometime ago and the dive factory came out with a new trigger and changed them out free of charge. I would go with which ever one feels better in your hand. Simotal/Picasso has been using plastic cartridge triggers for years pretty much without fail so the trigger issue is a non-issue to me. Get the one that fits your hand the best.
Someone also stated that there is nothing one manufacturer can do to make the gun swing better, I would also disagree look at the shape of the Cayman HF and HF2 I believe the difference it tracking is noticeable.
Of the two I prefer the RA because of the handle (even though its not my favorite) and the track on
the gun.
If the trigger is that big of an issue then get an Aimrite and you will have no worries.