I grow both and to be honest I have not noticed any preference by any insects or on the crop from each group.

Probably the variety is more important than the flower colour.

Thank you for your replies, just one thing in particular, I have grown both this year and, so far, the reds are more productive while the whites are a better quality. Anyone else found that?.

that's interesting

I've read the birds prefer the red flowers but leave the white alone

I've never had bird problems though

Of course you could sit on the fence & grow St George

https://s3-eu-west-1.amazonaws.com/seeds-plants-gardening/product-images/op/z/19882.jpg

I tried those but not impressed

White Emergo I liked but I've tried loads over my growing decades and TBH there were good & bad years with all varieties

Thank you for your replies folks, any information is good.

I would plant both red & white without giving it much thought. In my experience, the best ones are always from cross-pollination. The bees are experts at that, so just leave it to nature.

This year I have pink ones - very pretty but no scent and the set is pathetic so far.

Lack of pollination Sue?