It isn't about the products, it is about the pricing model in a similar market.
Second, for sub 50ms workloads [0], Workers is absolutely a superior solution to API Gateway + Lambda or Cloudfront + Lambda at Edge if the workloads can fit 128MB RAM and package/compile to 1MB JavaScript or WASM executables, in terms of cost, speed, latency, ease of development etc
[0] For Workers, 50ms is all CPU time and that is definitely not the case with Lambda which may even charge you for the time it takes to setup the runtime to run the code and time spent doing Network IO and bandwith and RAM and vCPUs and what not.
