Depending on how busy your music/production is, you might not have a lot of sonic space in the mix. In these instances, a mono shaker might be the ticket.
However, if you want a drum kit to sound more realistic, you’ll probably want to use the stereo overhead mics for the hi hats rather than a single mono source. This gives a real sense of depth, space, and width that you can only achieve with a true stereo recording.
Stereo shaker and tambourine? Well, it turns out they sound way cooler captured in stereo. There’s more detail, more sense of space, and you even get width with the side to side movement of the tambourine when it’s played. Of course we have the regular ‘mono’ sources as well, but it’s really fun to play with the stereo ones too. The option is yours.