I always confuse Jimmy Kimmel and Jimmy Fallon.
Same here. I have not tuned into any late night show for years. Now David Letterman and Jay Leno...I could tell these guys apart. David Letterman was great back in the 1980s and into some of the 1990s. With great musical guests and others who were interesting and|or funny.
One has actual talent. Both are lib assclowns, though the talented one tried to hide it a little more until recently.