Forget thrust to weight ratio! One key metric for Starship / SuperHeavy that& #39;s vital is thrust to area ratio!!! Raptor is currently at 270-ish bar & 1.66 mN for SN5/6/8. It& #39;s slightly below Merlin, but once ramped up to operational levels, it can easily match and exceed Merlin!
By the time you factor in the overall footprint with the turbopump / gas generator exhaust of the Merlin compared to Raptor, PLUS the ISP advantage with Raptor, you really begin to understand just how game changing this engine really is.