Having used Marathon Plus and Marathon Supreme, I'd recommend the supreme unless you're constantly riding somewhere where the roads are full of sharp things. They're still very puncture resistant but feel much nicer and are considerably lighter.
Having used tubeless tyres I would say just go tubeless and never look back.
Unless shoulder checking..
@Jezston started
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Having used Marathon Plus and Marathon Supreme, I'd recommend the supreme unless you're constantly riding somewhere where the roads are full of sharp things. They're still very puncture resistant but feel much nicer and are considerably lighter.