When you visit the Google’s chatbot bard’s website in Microsoft Bing. A New Button pops up besides the search bar which lets you compare bard results with Bing chat’s. I have no idea why they implemented this, well maybe to show off the their chatbot is better than bard or something?
It happens on Edge but not Firefox I believe. My work laptop defaults to Edge (and we use all Microsoft Web services so I haven’t cared to switch the default) and Google services prompt to try Chrome there.
Edit: I just checked and it doesn’t seem to be there. Either I imagined it or they removed it.