I love marmite, I loved twiglets. Then I was forced to go gluten-free. That ruled out both Marmite and Twiglets, also the default Vegemite.
I've yet to find gluten-free Twiglets, but thankfully there are gluten-free alts for Marmite and a GF Vegemite. As a Brit, Marmite takes the crown though.
As a Vegemite addict, I find Twiglets (despite the Marmite) compulsively addictive. Fortunately, they're hard to find over here, hence my addiction is under control.
BTW, I also like Marmite but not as much a Vegemite. When I was a kid, we had both at home, my mother favored Marmite, and as the ad goes, the rest of us were happy little Vegemites: https://m.youtube.com/watch?v=LZF3FBh-n_8
I need to try Marmite or Vegemite.