Should I use variations or separate listings?

Hello,

Tried searching the forum but didn’t find much…

I sell a product with 16 variations (4 x sizes, 4 x colours). I run PPC but for a Sponsored Product campaign, my understanding is that it will only ever show one of my child products at a time. If I split the product into 4 listings (i.e. a separate listing for each colour), then am I right that I could get more exposure with more Sponsored Product results?

Has anyone tried this or have any recommendations for/against doing this? I realise the downside is I will have fewer reviews per listing as they will be split.

Is it easy to split the current product up into separate products? Is it easy to re-combine them if I decide it didn’t work and I want to revert?

Thanks in advance,
Adam