I shoot both, and have zero problems switching back and forth. I don't know why that is. I grew up shooting a double trigger S x S, but shoot single trigger guns exclusively in competition, over and unders and side by sides. I really don't have a favorite between single and double triggers. My double guns with single triggers are 100% reliable, or I wouldn't have them. I have no tolerance for a mechanism that fails me from time to time, however seldom it may be.
If you decide on a single trigger, make certain you do the homework to determine if that particular gun has any reliability issues with the trigger. Contrary to what some may tell you, there ARE single triggers that are just as reliable as double triggers.
What is has been your past concerning triggers? Have you shot double triggers much? If not, be determined to do the requisite practice to get to the point that double triggers are "second nature" to you. I do not know how much shooting that would take for someone who grew up shooting a single trigger gun. Maybe quite a bit.
One last thing I would offer. If the single trigger gun is not barrel selectable, either get it choked the same in both barrels or leave it alone. There is no way to predict whether you will need the open, or the tight choked barrel, first. This is my experience, MBSR.
Best wishes, Stan