I have a cherimoya and an atemoya, and I was wondering if there is any benefit or downside to cross-pollinating between them?
No real experience, but from the many post about the moya and atemoya plant, is that they can be used to cross pollinate each other(after all atemoya is a sugar apple x cherimoyaa hybrid). The resulting fruits will not change, but if you plant the seeds from that cross pollinated fruits seeds, it will not be either a moya or atemoya. But, might look more on the moya side, since your back cross pollinating with a parent plant. That's why atemoya seeds are only planted for fun or rootstock purpose, but moya is usually used for rootstock, due to their better cold and wet feet tolerance. And like most hybrid fruits, atemoya seeds will not come true to be a sugar apple or cherimoya.
I'm not too concerned with the seeds at this point, just curious if it would affect the taste. Guess it makes sense it wouldn't, otherwise you'd get a lot of variation from natural pollinators. Having to do my own pollination made me think a little more about it... which gets dangerous :)
Ya, just don't over think it too much, it can get dangerous as you say ;)