We have a 2 IBA running identical WW
Razor Profile touchless systems. Have had great experience with the
Razor, both minimal/minor issues as well as good customer support. When the depreciation runs down on the machines we'll sell them and refit the bays with new equipment. When we do this we'll be in the same spot as you considering whether to stick with two touch free or go with one of each.
I'm not set on either but lean heavily to keeping with the same set up. If I had 3 or more bays and planned to be onsite often I would definitely go with some combination of friction and touchless but two bays is a harder decision. I don't know from experience, but I'd imagine maintaining two different machines is going to be a little more time, money and headache since there will be different parts, different useful life of those parts, and different knowledge base of operation.
We've been open a little over 4 years and in that time have steadily built up a loyal customer base (as an aside we've seen 19% yoy increase since we upped our online game). Of course all of these people like the touchless. Having the two bays gives us the advantage during busy times. The challenge with an in-bay is time, you just can't get people through fast enough when the conditions are right and lines start forming. When the line gets to the street we lose customers. There is no where for them to wait so they drive away. So my fear with having two different systems is having two different customer bases and losing that advantage during busy times. For example if someone likes the touchless and they drive in and the line is long they're not going to go to the friction, they'll just drive away. In this case it's just like having a single bay. On the other hand I suppose there is a potential to increase the customer base who prefer friction to offset this. Would be great to see some data. good luck.